After implantation of the embryo, the level of hCG increases, which can be fixed with the help of testing. This is a type of research in which the tester is immersed in a container with urine, a positive result should be ascertained in two strips. When to do a pregnancy test after ovulation, so that he can establish the fact of fertilization? Usually, doctors recommend using the test method after a delay, but it is known that he can establish a pregnancy from the 7th day after the merging of gametes.
How long should testing be done?
How long after ovulation can I do a test? The result of the study may vary depending on the type of tester used in the test and the accuracy of the instructions. Annotation to the tester strip usually indicates that it can be used from the first day of the delay. This manufacturer's recommendation is designed to reduce the number of unsuccessful results. However, it is known that before a delay a highly sensitive test can fix a pregnancy. Sometimes the method allows you to get reliable information for a couple of days before the delay, but there are cases that 5 days before.
This difference in results depends on the sensitivity of the product. One test can fix the concentration of hCG in 25 units, but there are more sensitive ones that can even respond to 10. Lightly colored strips can be seen already a week after the oocyte's release. At the same time, the second band will be less pronounced, since the concentration of hCG is still quite small, but this result should also be regarded as positive. After a couple of days, the content of hCG will increase, and it will be possible to conduct the test again. This time the second strip on the test will be brighter colored. But before 7–8 days after ovulation, testing does not make sense because in the pre-implantation period, chorionic gonadotropin is not released.
What signs suggest it's time to do a test?
The initial signs of pregnancy appear with varying intensity. Many, soon after fertilization, begin to feel that changes are occurring in their bodies. And some of the idea of a possible pregnancy suggests only a significant delay in menstruation or a visit to the doctor.
A reliable sign of the presence of pregnancy is the absence of menstrual bleeding, in addition, the following symptoms may indicate fertilization:
- Characteristic blood discharge, signaling that there was an implantation, that is, the embryo took root in the thickness of the uterus.
- An increase in the size and sensitivity of the mammary glands, which indicates changes in the breast tissue. After conception, the glands begin to rebuild, the female body is prepared for lactation.
- Some women change their taste preferences. This is due to a deficiency in the woman's body of essential substances. A future mother may experience cravings for food she did not like before, and also want non-edible things (for example, chalk).
- A fairly common symptom is frequent urination. This is due to the restructuring of the hormonal system and the relaxation of the sphincter of the bladder.
- A woman experiences weakness and fatigue, she constantly tends to sleep, decreases memory and ability to concentrate.
All the above symptoms are caused by hormonal changes occurring in the body of a pregnant woman.
When can a test fix a pregnancy?
If conception has occurred, it is not immediately possible to know reliably. How much after an ovulation test will show pregnancy? The first week the fertilized egg undergoes continuous transformation and reaches the uterus, where the embryo is implanted and continues its further development.
The embryo during maturation passes through the following stages:
- crushing, the formation of a blastocyst,
- implantation, gastrulation,
- neurulation and organogenesis.
After 7-10 days after the fusion of the gametes, the embryo attaches to the inner surface of the uterus, after which hCG begins to secrete. Sometimes women feel when they have an implantation of the embryo, while they notice a slight blood circulation from the vagina. At this time, you can conduct a jet test for pregnancy, but a sufficient level of hCG will be established only after a couple of days.
How to conduct testing
During implantation, the level of hCG is about 2 mMe / ml, with most conventional tests having a sensitivity of 20 mMe / ml. In order for the test to give an objective result, it is necessary to carry it out 12-14 days after implantation, that is, on the days corresponding to the start of a new cycle.
It is necessary to do the test in the morning, because at this time of day the concentration of hCG in the urine has a maximum value The first portion of urine is used. This is provided that at night the woman did not urinate. If a pregnant woman tested at another time or took too much liquid, the result may be false negative. The strip should be immersed at a certain level and observe the duration of the procedure specified in the instructions.
Those women who want to get results before the delay of menstruation, you must purchase a highly sensitive product. Jet tests have a sensitivity of 10 mMe / ml. In addition, digital diagnostic devices record the estimated duration of pregnancy. Conducting a testing procedure should always be supported by examination and medical examination, this is the only way to objectively confirm pregnancy and avoid possible complications.
What happens in the first days after conception?
Usually in clinics considered the beginning of pregnancy the first day of menstruation, preceding conception. This is not entirely correct, so we will argue from the point of view of the true term, that is, from the moment of the actual fertilization of the egg.
During ovulation she comes out of the ovaryand moves through the fallopian tubes. The task is to meet with the sperm. If this happens, the conception has come true. After that, a zygote is formed, a kind of "union" of the egg with the male seed.
During the week it moves to the wall of the uteruswhere will be fixed and will begin to develop. At the same time, the first signs of pregnancy appear: the basal temperature rises slightly (by about 0.4 degrees), problems arise with the gastrointestinal tract.
it very risky period, because before the future embryo is fixed and the placenta is formed, the female body perceives the fetus as a foreign object and may try to reject it.
How does he determine the result?
Practically all pregnancy tests respond to hCG (human chorionic gonadotropin), which was mentioned above.
His blood concentration starts to increase after fixing the embryo on the wall of the uterus, that is, 5-8 days after conception, and it reaches its maximum concentration by 6-8 weeks of gestation, after which it begins to slowly decline.
Almost all the "models" of pregnancy tests have an absorbent layer. It contains a chemical that reacts with the active elements of hCG. To obtain the result you need to soak this layer with urine or, less commonly, with blood.
After a short time there will be a reaction that will show whether the conception was, or the anxiety turned out to be false.
In this case, the results can be as many as three.
- There was one strip. The test is successful, HCG will not find or has a minimum concentration, there is no pregnancy.
- There are two strips. The test took place, HCG is available, the woman is pregnant.
- No stripes. The test is considered unsuccessful, for some reason the reaction did not occur.
The last scenario is possible in the situation when woman breaks technology use test. In other cases, there is a defective product.
The fact is that the first bar always shows up after use, as it contains a substance that stains upon contact with any liquid. She was created in order to assess the "health" of the acquired pregnancy test.
With a regular cycle
How to calculate this day, especially if lately there have been several sexual contacts that can lead to pregnancy? In this case, it is recommended to wait for the expected onset of menstruation.
On average, monthly repeat every 28-32 days, it depends on the natural cycle. But one should not be guided by these average indicators, since the body of each woman is individual, and it is impossible to find general indicators.
For example, they are known for the case when the cycle is only 21 days, and sometimes it happens that ovulation occurs as much as two times per cycle. In other words, to calculate the time of the pregnancy test, you need to make your individual calendar of the menstrual cycle, and wait 1 (maybe 2) days from the moment of the delay.
With irregular cycle
Here the calendar system will not work, since there is no clear cycle, it is not always possible to calculate the delay time. Relying in this situation is worth having occurred sex.
- From the moment of the alleged conception we count 8-12 days. This is more than is required to attach the embryo to the uterus, but it will be more reliable.
- Remember what other unprotected contacts lately could theoretically lead to pregnancy. If there were several, then remember the approximate date of each, and every 5-7 days do the test. There should be as many of them as there were contacts.
With an irregular cycle, false results are obtained quite often. If you have trouble at all with this case, then it will not be superfluous to pass the analysis for hCG in a clinical setting, and at the same time examine the urogenital system.
How to use?
We will look at the features of different types of tests a bit lower, the principle of operation is the same for everyone, so for now we will limit ourselves to general recommendations. Remember an important moment - as a biomaterial, you must use the morning urine.
It is at this time of day. it contains the most natural concentration of hormones, including hCG. In this case, before conducting the test, you need to thoroughly wash and dry off.
Admixture of foreign substances almost guaranteed to lead to a false result, determine pregnancy under these conditions is almost impossible.
After preparation you need to collect urine in a pipette or a special container (if you decide to use the jet test, then you need to urinate directly on it).
The biomaterial is placed on the absorbent layer. It remains to wait a little result. As mentioned above, if two strips are congratulated on conception, one stripe is not pregnant, not a single stripe buy another test.
How to choose the most accurate?
The principle of operation of all tests is the same.they "look for" in the hCG biomaterial. Only the level of accuracy and usability is different.
By the way, these parameters are interrelated - if the test is inconvenient, then urine contamination with external impurities is not excluded, this significantly reduces the effectiveness of the home examination.
Great value is the price accessory. If it is too cheap, then the production uses the most cost-effective reagents, their sensitivity leaves much to be desired.
Also note to the level of sensitivity indicated on the package. Manufacturers call the most effective products that have a value of 10 mIU / ml.
A dubious statement, as it is difficult to prove the real degree of sensitivity of such “mega-tests”. In reality, even those accessories that have a label of 25 mIU / ml show very good results.
Features and Chinese know-how
Any Chinese know-howthat promise an instant, accurate expiration result - duck, there are no such tests. There are only four main types of products.
- Test strip The most popular type, which is inexpensive, and the results show quite accurate. To use you need to urinate in a jar, and then dip the test into it. Accuracy approaches 99%.
- Inkjet test It is not very convenient to use it, but its accuracy at a height is almost impossible to contaminate urine with foreign impurities. It is necessary to urinate on the selected sector of the product, and then wait for the result. The disadvantage, however, it has a significant - high price.
- Tablet tests. Are expensive to use uncomfortable. Of the advantages, it is usually noted that the possibility of using is not after the first delay, but immediately after conception. For analysis, you need to collect urine in a pipette, and drop it in a special hole. In everyday life, few are used because of the high cost, mainly found in hospitals.
- System with tank. The most accurate, but also the most expensive option. Differs in the big sizes that does not allow to use an accessory far from the house. Urine is placed in a special reservoir, after which the result is displayed on the screen.
When choosing a test pay attention to customer feedbackand, of course, cost. It is not worth spending a lot of money on a one-time accessory, but do not buy too cheap tests either, they have low accuracy.
Does it always show true results?
Unfortunately, even the most expensive and proven Thousands of consumers can test false results. The reason is not in the quality of the product, but in the state of the woman's body.
It is worth noting that the wrong result happens only in five percent of cases, and some of them appear when using the stitched test. But in other cases there is reason to think about your health or, at least, about the observance of the rules of personal hygiene.
If a woman has poorly washed away before using the test, the urine may become contaminated. As a result, the result will be incorrect. In addition, hCG is not always produced only in cases where pregnancy is relevant.
If a girl recently suffered a miscarriage or an abortion, the hormones could not yet "get up" in the usual direction, respectively, the result will be false. The same applies to situations where the patient is taking hormonal drugs, including contraceptives (paradox - drinking pills from pregnancy, and the test result is positive).
When to go to the doctor?
Some terrible diseases strongly affect hormonal levels, including increasing the concentration of hCG. These pathologies include a variety of cysts and cancers. And they usually are not benign, although exceptions are found.
Cancer does not necessarily affect the genitourinary system, cancer, in any case, affects hormones, so the examination by a doctor should be comprehensive.
Different situationwhich is somewhat softer is a cyst of the stomach or ovaries. In both cases, you need a detailed examination and treatment.
The pregnancy test has long become a magic wand for those women who want to quickly and accurately find out about the fact of their pregnancy, or vice versa - to refute the assumptions.
The main varieties provide very high accuracy, they are convenient to use, but can sometimes give a false result. In some cases, this is a sign of a dangerous disease, so if you are not exactly pregnant, but the test showed two strips, then immediately go to the doctor!
The principle of the pregnancy test
To understand what period after ovulation a test should be conducted in order to show a reliable result, it is necessary to understand the principle of its action. The basis of the work of pregnancy tests is their reaction to hCG - human chorionic gonadotropin.
The test has a special layer with characteristic absorbing properties. It contains an element that reacts with hCG. The essence of the procedure is reduced to the need to lower the layer in the urine for a short period of time (sometimes substitute a jet), after which a corresponding reaction will occur for a short time period.
Three test results are possible:
- Negative. The test shows one strip - control. This means that there is no pregnancy, since hCG was not detected or is present in a minimal amount. One strip always appears, as the dough contains a substance that reacts to contact with a liquid. This is how the quality control of the product is carried out.
- Positive. About the coming pregnancy say two clear strips that show the presence of hCG. A weak second bar indicates that the woman is pregnant, just the level of hCG is still too low.
- Erroneous. Due to certain reasons (expiration date, marriage), the reaction may be absent, and there will not be a single strip on the test.
On which day after conception does the hCG level rise?
After conception, when the sperm fertilizes the egg, it takes time for it to be fixed on the walls of the uterus. Only then in the female body begins hormonal adjustment, and we can talk about pregnancy. It is from the moment of implantation of a fertilized egg in the uterine cavity 5–8 days after conception that the production of hCG begins.
Initially, its concentration is negligible. The maximum values are reached at 6–8 weeks, after which the indicators of hCG begin to gradually decrease.It can be concluded that it is pointless to do a test earlier than a week after conception, since hCG is not yet produced.
When is an ovulation test worth doing?
Not every woman and can not always call the date of conception, especially if the attempt was not one. For this reason, many are trying to focus on the time of ovulation. As a result, the question often arises on which day after ovulation testing should be done so that it gives a reliable result.
Ovulation itself and how much time has passed since it does not play an important role in determining pregnancy. The main factor is the sensitivity of the test used. By the beginning of the 2nd week, the level of hCG reaches 10 IU, but not all existing tests are able to catch such a concentration. In this case, they will show a negative result. Only on the 11–12th day of pregnancy, the concentration increases to 20–25 IU, and this is sufficient for all types of tests.
Can a test be wrong?
You can always get a false positive or false negative pregnancy test result. Most often this is due to the quality of the product. It is also easy to face an expired test, which has expired, so it is important to always look at the dates indicated on the package. Be sure to check its integrity. Strongly wrinkled or torn packaging indicates improper storage.
Despite this, even high-quality expensive tests of well-known brands that have proven to be reliable brands can give a false result, and this has nothing to do with the quality of the product. There is not one factor influencing the test score.
If the analysis is done early
Often a woman can't wait to find out if she is pregnant or not. Haste in this matter can only harm.
A false result is explained simply. Immediately after conception, the level of hCG is not yet so high that the test can react with it and show two strips. The second reason why a test happens to be false during an early exercise is late ovulation, which is why the test is negative even when menstruation is delayed.
If hCG is not elevated due to pregnancy
In addition to the false-negative test, a false-positive result is also encountered, although by an order of magnitude less often. That is, after all the manipulations, the woman discovers two strips, not being pregnant. The reason for this error can be that the increase in hCG is not caused by pregnancy, but by other factors. Their number should include:
- medication to combat infertility, which includes hCG,
- the presence in the body of a malignant tumor,
- recent birth or miscarriage, after which fragments of the ovum remain in the uterus,
- stopping the development of the fetus (the level of hCG is still high).
If the test is not performed correctly
Another common reason that leads to erroneous results is non-compliance with all testing rules. Each model has a clear instruction, which describes in detail how and in what sequence specific actions should be performed. If it is not followed, then the test will be unreliable.
In addition, the analysis time plays an important role. The best time of day to determine pregnancy is morning. It is then that the most concentrated urine is collected at night, therefore the accuracy of its analysis is much higher. In the afternoon or in the evening the probability of receiving an erroneous result increases.
It is important to maintain cleanliness and sterility when conducting the check. Urine should be collected in a special sterile container, hands and genitals should be pre-washed and wiped dry. Extraneous inclusions may distort the result.
Can the test show a negative result for 8–10 days after conception?
It is not uncommon for a girl to do a test a week, 10 days after conception, and he, despite the onset of pregnancy, shows a negative result. This is possible, even if we exclude all possible options that cause false indicators, that is, all the rules of conducting, the sequence of actions and personal hygiene were followed before the procedure.
It all depends on the sensitivity of the test for hCG and its amount of the hormone in the urine. On such a short period in women, its concentration may be very low, insufficient for reaction with the active substance present in the dough layer. This is a negative result, although the implantation has occurred and the fetus develops. It happens that the level of hCG grows so slowly that a false-negative test is observed 21 days after conception. It is better to donate blood for analysis and determine the exact level of hCG.
What pregnancy tests are there?
There are more than enough indicators for pregnancy today, and all of them have their advantages and disadvantages. It is clear that the more informative and sensitive the test, the more expensive it will be. And the effectiveness of budgetary options is usually influenced by the correctness of the procedure and the terms, after how much you can determine the pregnancy started by the test.
Testing should be applied when it is already possible to establish a pregnancy after conception with a test. All currently known indicators are based on this rule:
- strip tests, or test paper stickers - the first (and oldest) of the available methods for identifying uterus fertility after conception,
- tablet tests are somewhat more sensitive indicators compared to “litmus test”,
- jet - the third generation of indicators, characterized by high sensitivity and speed of response,
- electronic - an improved version of the inkjet test, the convenience of which lies in the screened image of the result.
Positive pregnancy test
Since the tests differ in their susceptibility to hCG, they should be used at an appropriate time, as the amount of gonadotropin increases. After how many days after conception, it is possible to establish pregnancy with a test, the susceptibility of the indicator to hCG decides.
How do they work?
To obtain a response when the indicators of pregnancy are used, women's urine is used, so testing should take place in appropriate conditions.
The simplest and most affordable strip test is based on a study of fresh urine in the morning (where the level of hCG is higher), so it is done immediately after sleep. A woman is required to urinate in the dishes for testing and drop the paper indicator to the MAX mark. Hold the strip in the container with urine should be at least 10 seconds (preferably 20). Then you need to get a strip and put in a horizontal position for the time specified in the instructions for use. How to determine by test, pregnant or not?
After the specified time, the transverse dark pink stripes are visualized on the indicator:
- if there is one strip - there is no pregnancy (most likely),
- if 2 strips appear, there is a pregnancy,
- the complete absence of stripes indicates a test failure (which can happen if it is not stored properly).
Manufacturers claim 99% accuracy of the results, but the percentage of real accuracy of the strip test is much lower. The reason for the incorrect result may be improper use of the test:
- the procedure is not with the morning urine,
- insufficient or too deep immersion of the strip into the urine,
- inconsistency or overexposure testing time.
In addition, the indicator has the lowest sensitivity strip; it responds only to the hCG concentration, which is 20-25 IU / l. This level of hormone is formed only by the end of the 2nd week, which means that by about 15-16 days after conception.
The plastic tablet for testing does not need to be dipped anywhere. But the container for urine is still needed, since a drop of urine needs to be applied to the opening (window) on the device. The hCG in the drop interacts with the reagent and causes the neighboring window to be colored, changing color.
How many days after fertilization can a pregnancy be determined with a tablet test? This method is somewhat more sensitive and is used 10 days after conception.
It looks like a tablet test for pregnancy
Inkjet and electronic
The third generation of test instruments offers inkjet indicators, with which you can do the procedure during urination. Despite the "rate of fire" manipulation, it is the most effective and sensitive indicator for today. It can be done in 7-10 days after conception with any urine (not necessarily in the morning); you will not need a separate container for testing. Under the stream of urine just need to bring the receiving tip of the indicator, then after a couple of minutes to consider the result.
The electronic indicator is similar to the jet one, only the result is determined not by the coloring of the indicator window, but by the inscription on the screen:
- Pregnant - means pregnancy
- Not pregnant - no pregnancy.
Despite the obvious advantages of these indicators, not everyone agrees to do tests with them, since the instruments are notable for high prices.
Electronic pregnancy tests with positive and negative results
After how many days can you determine pregnancy test?
Regardless of the date of conception or intercourse, the time, after how many days you can do a pregnancy test after ovulation, is entirely subordinate to what kind of indicator you are going to do the test. Since conception takes place only within 24 hours after ovulation, there is no fundamental difference between such reference points as sexual intercourse, conception or ovulation.
After conception (ovulation, act)
When buying an indicator, girls are often interested in, after how many days can a pregnancy test be performed after ovulation occurs? And quite often get a counter question - what do you mean by ovulation. Ovulation - the release of a ripe egg from the follicle - can not be felt, it can only be calculated or determined in different ways.
The day of ovulation is the best time for conception, so that the countdown can be conducted by the time of committing sex. Although this factor is not so important. The most important parameter in how many days you can do a pregnancy test after the act is the type of indicator with which you are going to do the test.
After how much can you determine pregnancy after conception by the test in the form of strip strips? The sensitivity of paper indicators is 20-25 International Units, this content of hCG is achieved only by the end of the second or the beginning of the third week. This means that strip strips can be checked no earlier than 15-16 days after conception.
The procedure of in vitro fertilization is performed in a test tube, then the resulting zygotes are tested for the presence / absence of genetic pathologies and only then are implanted to the expectant mother through the vagina. It would seem that planting a finished ovum guarantees positive responses of indicators with any sensitivity, but everything is not so simple. In practice, it turned out that after the IVF procedure, it is pointless to do checks earlier than in 2 weeks.
Features of the procedure suggest the probability of false positive results for at least two reasons:
- definition of chemical pregnancy - the embryo reached the uterine wall, but could not implant,
- IVF protocol often includes administration of the drug based on hCG.
Removal of artificially injected hCG from plasma takes place over 14 days after replanting zygotes, so it is pointless to do a test before this date. That is why the answer to the question of how many days you can do a pregnancy test after the IVF procedure is unequivocal - 14 days after the replanting, not earlier. Most doctors advise their patients who have undergone IVF, not to do testing at home, and to take a blood test for hCG in a medical institution.
After the delay
And after how many days you can do a pregnancy test after a delay in the regulation? Let's count. If ovulation (and likely conception) takes place 14 days before the start of regulation, then by the time of delay, the zygote's age is already about two weeks. At this point, the amount of the hormone hCG rises to 20-25 IU, which makes it possible to do the test in all the ways described above (any of them) a day after the delay.
After how many days you can do after menstruation?
It happens that a girl (although more often a woman with experience) suddenly feels the presence of pregnancy on indirect grounds, but there are still a few days left before the next cycle begins. Does she need to wait for a delay or can she do a test?
You can choose the starting point of the previous menstruation only if you can calculate the time of your own ovulation. So, with a cycle of 28 days, it will occur on the 14th day after menstruation, and with a cycle of 32 days - on the 18th day.
Given the vitality of sperm, it can be assumed that sexual intercourse, completed three days before ovulation, can lead to conception. But before ovulation occurs, and less than a week after it, there is no point in doing a pregnancy test.
Now let's calculate how many days you can do a pregnancy test after your period:
- with a cycle of 28 days - 14 + 7 = 21 (21 days after the start of the previous regulators),
- with a cycle of 32 days - 18 + 7 = 25 (25 days after the start of the last cycle).
What is the basis of the pregnancy test
The menstrual cycle and the whole life of a woman is controlled by hormones. They determine not only the possibility of conception, but also the psycho-emotional state, as well as health. The initial stage of the cycle is controlled by the hormone estrogen, after ovulation, the power takes progesterone. The balance of these hormones ensures the normal functioning of the female body, its readiness for ovulation and conception.
The pituitary gland produces another secret - human chorionic gonadotropin (hCG). Its natural content is usually around 5 mIU / ml. The production of the hormone in large quantities produces the placenta of the fetus, which is why it is called a hormone or pregnancy marker. In the first third of the term, the amount of gonadotropin in the body increases very quickly.
In the case of conception, the hormone content increases within two weeks to 25 mIU / ml. Conception in pregnancy tests is determined by the content of hCG in the urine. This hormone is present in the blood and urine of humans. Since blood levels are higher and laboratory methods are more accurate, with a lot of impatience, you can donate blood to determine pregnancy in the laboratory.
The use of test strips is based on measuring the content of gonadotropin in urine. After how many days after ovulation, you can do a pregnancy test, due to the number of reagents applied to the strip. Most tests determine a hormone concentration within 25 mIU / ml.
Determination of pregnancy at home with the use of test strips is very convenient and has a high degree of confidence. Testing is possible at a convenient time. However, when the concentration of the hormone is still low, that is, in the early stages, for greater certainty, it is better to do this in the morning when the content of hCG is maximum.
Important: Before using the tester, you should read the recommendations in the attachment. Following the prescribed rules will ensure the accuracy of the result and help avoid disappointments and mistakes.
If the use of the strip is advised after some time after the expected time of the onset of menstruation, it means that manufacturers know that the amount of the reagent is not enough to detect the conception earlier.
A prerequisite is to provide the desired volume of urine and time of contact with the strip. Those who can not wait to learn about conception, you need to remember that in the evening you should try not to drink a lot of fluid and not to use diuretics.
Error testing is possible in both directions - in the positive and negative.
Invalid positive result is obtained:
- When using some drugs.
- Immediately after the abortion.
- In the presence of tumors.
Testing will not be able to correctly detect pregnancy in the following cases:
- too early use, a low concentration of hCG is not detected by the reagent,
- changes in the composition of urine with excessive use of fluid or drugs,
- in the case of kidney or heart disease, conception will be easier to detect by blood.
On what day after ovulation the test will show pregnancy, depends on the test, and on other factors. If you use an inexpensive option with two strips, the pale second band confirming conception may be dim due to early use and insufficient concentration of hCG in the urine. Repeated testing after a while will confirm or deny conception.
More expensive test options allow you to determine the concentration of the hormone from 10 mIU / ml, that is, a few days earlier cheap. What means to use, the woman decides.
After how many days in the urine will be a sufficient concentration of the hormone hCG
At the time of great-grandmothers, when nobody knew about ovulation, basal temperature, delayed menstruation helped determine pregnancy. При регулярном цикле внимательные женщины уже подозревали зачатие по отсутствию выделений.
Важно: регулярные менструации еще не гарантируют возможность зачатия. Для наступления беременности необходима готовность яйцеклетки к оплодотворению.
Овуляция – исход зрелой яйцеклетки для соединения со сперматозоидом. Она начинает готовиться к оплодотворению с первого дня цикла. Выход в маточные трубы происходит в течение двух недель. For women, leading the schedule of basal temperature, this day becomes known for the growth rate.
This is not the only sign of egg readiness. Those who do not lead him, can determine ovulation on the following grounds:
- swelling and nipple sensitivity,
- increase in sexual desire
- changing the nature of cervical secretions,
- slight soreness in the lower abdomen.
The life of the egg - about 2 days. It is these days that fertilization is likely. Conception can occur from sexual intercourse, committed 3-4 days before the egg is ready, since so many spermatozoa retain vitality in the vagina.
After connecting with the sperm cell, it moves into the uterus to attach to the endometrium. This process lasts 7-10 days. Pregnancy occurs after growing into the endometrium. The production of hCG begins. His number is constantly growing. It is possible to use the test after a couple of days from the onset of delay, which corresponds to 14 days from the release of the egg. At the time of attachment to the endometrium, the level of hCG ranges from 2 to 10 mIU / ml, usually about 4. When choosing the time when you can do a pregnancy test after ovulation, you need to focus on these processes.
Every woman has cycles when the egg does not mature and conception cannot occur. 1-3 cycles per year are considered normal. If their number is greater, you need to consult a doctor in order not to see the developing infertility.
It should be noted that the increase in the amount of the hormone in the blood will continue until the 10th week of the term. By its amount one can judge about the successful development of pregnancy. In the future, the figure will decrease to 20 weeks, and then stabilize.
For a greater likelihood of accurately determining how many tests need to be done, and how often?
The timing of ovulation, the duration of movement into the uterus and fixation on the wall are very individual, depending on the body, the length of the fallopian tubes. It is impossible to determine them exactly, they are unique for each woman. Therefore, manufacturers of tests and offer to wait for the delay of menstruation. Even if fertilization has occurred, the egg may not reach and grow into the wall of the uterus.
If there is no strength to endure, you want to know about pregnancy more quickly, you should acquire tests for which a sufficiently low content of hCG in urine. Usually manufacturers indicate this on the packaging. At the same time, it is necessary to be ready, that it is necessary to repeat testing in terms when the concentration of the hormone is more significant.
With a positive result, one study is usually enough. If testing was carried out at an early date, and the result was negative, it would have to be repeated, since the level of the hormone could be very low, even with the onset of pregnancy and a highly sensitive test.
In addition, you should be prepared for the fact that tests can be wrong. Usually two tests with an interval of 3 days are enough to accurately verify the result.
What test strip to choose
After how many days after ovulation you can do a pregnancy test, it is quite difficult to determine. All indicators of natural processes vary within certain limits. If you need a reliable answer, you should focus on the last day of all deadlines. This usually corresponds to the start of the next cycle.
Highly sensitive testers can determine conception 2-3 days before the arrival of menstruation. Most gynecologists believe that all the strips are equally reliable when used properly. If you apply them in time that does not meet the recommended, you will have to do repeated analyzes.
Testing accuracy is usually greater than 95%. Inkjet testers can be considered the most convenient, since no special actions are required.
Tablet tests are considered to be the most accurate, since the sensitive layer is well hidden in the body, and urine is applied to the right place with a pipette in the required volume. Their susceptibility is 10-25 mIU / ml.
The most democratic, cheap and popular - strip strips. They also give the necessary accuracy when used correctly.
What happens in the first weeks after conception.
The first weeks after conception, the fertilized egg begins to move into the uterine cavity. This process can last from two to 7 days. Then another few days the egg floats in the uterus until it finds the place of implantation. Only after this point a woman can be called pregnant.
This period is considered the most dangerous. The body perceives the embryo as a foreign body and tries to expel it. According to statistics, about 30 percent of pregnancies fail during this period. This happens in the form of ordinary menstruation, and the woman does not even realize that conception has occurred.
If all goes well, then in the female body begins to produce the hormone hCG. During this period, the placenta and the umbilical cord of the child begin to form. Sometimes a woman can feel the moment of implantation of the fetus. This is manifested by pinkish secretions, cramping in the lower abdomen and some tingling. Often, everyone perceives yellowish marks on linen or toilet paper as the beginning of menstruation and does not pay attention to them.
Symptoms of pregnancy in the first weeks
- Bloody pinkish discharge during implantation.
- Increase in basal temperature.
- General malaise and fatigue.
- Morning nausea.
- Crying, irritability.
- Tingling in the vagina and in the uterus.
- A feeling of heaviness in the lower abdomen.
- Food perversions.
We should also talk about the last point. A huge number of women learn about conception only after they begin to show strange taste tastes. For example, eating chalk, lemons, soaps. You may want to eat an unusual combination of foods, for example, a sandwich with jam and sausage, chocolate with herring, and so on.
Optimum test dates
So, on what day after ovulation can you do a pregnancy test? Doctors give a definite answer - testing makes sense to do only after a delay in menstruation for at least one day. There are a few more nuances about the use of the test.
- Urine should be only morning.
- At night, before testing, you can not drink, on the eve of taking alcohol and smoking.
- Be sure to comply with the conditions of the instruction.
- The test should not be expired.
When conceiving a test after a delay will certainly show a positive result. However, there is one BUT - if a woman does not have a standard cycle or ovulation occurs later, then the test strip may show a very weak second line. In this case, it is necessary to do testing in a few more days.
Another important nuance - carefully monitor your menstrual cycle. This will help you in the future to sensitively listen to your own body, to understand when ovulation occurred, and whether the long-awaited conception occurred. For example, when an egg is released, the discharge becomes viscous, similar to egg white, it can ache the ovary. Record all these signs.
False test result
It also happens that there is no menstruation, and the test shows a negative result. You should not get upset - this is possible with a later ovulation or with a weak increase in the level of hCG.
Another reason is incorrect use of tests, or a defective product.
If there is no menstruation, and the tests show nothing, it is best to donate blood to the level of the hormone HCG. Sometimes several tests are assigned on different days in order to assess the dynamics of growth. It is by these parameters that one can understand whether there is a pregnancy, whether it is developing. A frozen pregnancy is defined as follows - hCG does not grow, but rather falls.
Another important factor is the sensitivity of a particular test. As a rule, the cheapest test strips often do not show early pregnancy. Now on sale there are digital tests that can identify even the earliest terms of conception. They cost a lot, so it makes sense to immediately take a blood test for HCG levels.
False pregnancy is a rare occurrence. This condition, when a woman is sure that the conception of a child has occurred, feels all the symptoms of pregnancy, but in fact it does not exist.
The causes of this condition are unclear. Most often they are affected by those women who very much want to give birth and unsuccessfully plan pregnancy. With a false conception, even a positive pregnancy test is possible. This condition can last for about 4 months.
Making sure the pregnancy is easy - you need to do an ultrasound, as well as conduct a manual examination of the cervix and vagina. As a rule, after a detailed conversation with the doctor, the woman ceases to inspire herself that she is pregnant. In extremely rare cases, psychoanalytic assistance may be required.
How to prepare for conception
If you decide to have a baby, it is important to prepare the body for the successful conception and carrying the baby. So what should be done during the planning period of pregnancy?
- Both women and men should have a complete blood count to determine if there is an infection in the body.
- Partners are tested for sexually transmitted infections.
- It is important for a woman to be tested for hormones, check the state of the thyroid gland, check blood clotting.
- The future mother needs to check her teeth, and if necessary, cure caries. Extra foci of infection in the body to anything. In addition, during pregnancy, the condition of the tooth enamel may worsen even more.
In addition to the remaining items, the expectant mom and dad are advised to quit their bad habits at least six months before the intended conception. It is important for a woman to eat properly and balanced. Full ladies, it is desirable to lose weight, because it often prevents conception.
An important caveat - if you decide to plan a pregnancy, you can not take drugs that strengthen and enhance immunity. The fact is that when conceiving the defenses of the female body weaken a little. This is necessary so that the body does not consider the fetus to be a foreign body and does not reject it. Too strong immunity can lead to miscarriages. Therefore, strengthen the body in a natural way - proper nutrition, regular exercise, walking and quitting smoking and drinking alcohol.
What if the cycle is unstable or too long?
If a woman jumps the menstrual cycle, then determine the exact time of ovulation is quite difficult. To date, there are two options - tests for ovulation, as well as ultrasound.
The first method is used at home, and all public and private clinics now offer tracing the release of the egg using ultrasound. This option is more accurate because home tests can be wrong. If you have problems with hormones, it is best not to spend money on these tests, but to consult a doctor.
We hope that we have answered the question of when to do a pregnancy test after ovulation.
When to do a pregnancy test
Modern tests allow us to determine pregnancy in the shortest possible time after a "suspicious" intercourse. But this cannot be done earlier than is possible in principle. And in order to correctly answer the question posed, it is necessary to deal with the processes occurring after the meeting of the spermatozoon and the egg cell.
How does a pregnancy test work
So, we know that after fertilization has occurred in the blood of a woman, the level of the hormone HCG begins to increase, which indicates the presence of pregnancy. Having identified this substance, the test shows us a positive result - two strips. In fact, the test responds to the presence of hormone gonadotropin in the urine: when the level of hCG rises, the reagent on the second test strip appears.
HCG in the body of a pregnant woman is produced immediately after embryo implantation into the uterus wall, first in the blood and a little later in the woman’s urine, and usually in the urine it is in lower concentration than in the blood. Implantation, in turn, occurs on the 7-10th day after ovulation. But it must be borne in mind that the level of the hormone increases gradually, increasing daily, until it reaches a certain level, which the test is able to fix. This moment determines the time frame. That is, the test is able to "detect" the presence of the hormone gonadotropin in the urine of a pregnant woman no earlier than 11-15 days after the day of the last ovulation. The lower the threshold of sensitivity of the test, the earlier it will be able to determine the pregnancy and the more expensive it is. Tests with a sensitivity of 10 mIU / ml (as a rule, jet tests fall into this category) are able to determine the pregnancy that took place several (up to five) days before the expected menstruation. Tests with a sensitivity of 25 mIU / ml (strip stripes) determine pregnancy starting on the first day of the delay. But this is statistics. And there are also individual cases with early or late implantation. Therefore, a premature test can often be wrong.
How to make a pregnancy test
Regardless of the regularity of the cycle and other features of the female body, the reliability of the test will be the higher, the clearer the rules for its conduct will be. Any violations of the instructions may cause false results.
It is believed that in the morning the pregnancy test shows the most reliable results, since the concentration of hCG in the morning urine is the highest. But if the delay is already large, then the test can be done by and large at any time of the day.
A prerequisite is compliance with the rules of sterility: no foreign substances in the test liquid should not fall, and therefore the hands must be thoroughly washed and wiped dry beforehand. Also prepare a sterile collection vessel well in advance.
The test strip should be immersed in a vessel with urine only to the level indicated on its canvas, and always on the side where indicated (where the reactive substance is contained).
You should not evaluate the test result before the time specified in the instructions (usually, it is 5 minutes) or much later. After a long period of time, the results of any test are considered invalid.
Especially forberemennost.net - Elena Kichak
How does the test work?
Currently, to get a pregnancy test is not difficult. This indicator, designed for self-diagnosis of the presence or absence of pregnancy, is sold in any pharmacy. The reliability of the results obtained with this remarkable invention reaches 90%. However, many women, relying on their own knowledge, do not bother themselves with reading the instructions attached to the test. As a result, the results of the pregnancy test are not always true.
The test for determining pregnancy is a strip of cardboard, the surface of which is coated with a special reagent. The principle of home diagnosis of pregnancy is as follows. Immediately after fertilization, a special hormone hCG, chorionic gonadotropin, begins to be intensively produced in the female body. If a woman’s urine contains an increased amount of the hormone hCG, then when it hits the test, a corresponding reaction occurs - the strip changes its color, which confirms the presence of pregnancy.
When a sensitivity test of 25 mUI is used (an indicator of hormone levels), it is necessary to take into account that after ovulation the hormone level rises gradually. Therefore, the test will show the correct result, starting from the 11th day after the ovulation occurred. It is worth considering that the blood test is a more accurate and reliable option, since the content of the hormone in the urine is much lower and this indicator depends on many individual characteristics of the body of each individual woman. In addition, there may be early or late implantation - respectively, and the timing of the increase in the level of the hormone may shift. On average, after ovulation, implantation occurs after a week (with a cycle of 28 days), but there are significant differences.
A negative result of any test may be due to the fact that it was done before the onset of menstruation, when the level of the hormone in a woman’s body has not yet exceeded the norm. Therefore, it is recommended after several days to repeat the test (starting from the day of delay of menstruation). You can use tests with a sensitivity of 10 mUI - they are more sensitive and accurate, but also cost more. Such tests determine the occurrence of pregnancy even before the delay of menstruation.
Sometimes tests show a positive result, if from a previous pregnancy in the uterus after an abortion or miscarriage, the remains of the ovum remain - therefore it is better to consult a doctor if you suspect this. A fuzzy second strip on the test confirms the pregnancy - while the concentration of the hormone in the urine is low, this explains the pale color of the strip.
When to do the test?
Some women believe that it is possible to use the test to determine pregnancy after ovulation until the delay of menstruation, because an increase in the level of human chorionic gonadotropin occurs already in the first week after fertilization. This is not entirely true. It should take 10-14 days for the hCG hormone to reach a concentration at which the test strip could react to it. The test is not sensitive to the minimum amount of this hormone. Поэтому самое оптимальное время определения беременности с помощью тест-полоски – первый день задержки менструации.
Использовать тест нужно с утра, после того как женщина проснулась – это обеспечит оптимальную концентрацию гормона в моче. Применение специального струйного теста возможно днем или вечером.
If after the alleged conception blood began to be released, then the test should be done after dubious “menstruations”. Once the test has confirmed the pregnancy, the woman should immediately contact a gynecologist, since bleeding can be a signal of the risk of abortion.
Currently, there are already new, improved, determinants of pregnancy, for example, inkjet tests. They have a higher threshold of sensitivity, so a positive result can be obtained as early as 5 days before the start of the menstrual cycle. The inkjet test is a receiver rod (cassette) equipped with a reagent, a holder and a protective cap. Its main difference from the test strip is that this indicator for determining pregnancy is only necessary to hold under the stream of urine. This method of home diagnostics is much more convenient, since it does not require spending time searching for a suitable container and keeping the test in the urine. However, it should be borne in mind that compared to the strips, the cost of the jet test is much higher.
Features of a pregnancy test
Of course, a pregnancy test on the first day of a delay is recommended. The body of each woman is different, so the timing of the onset of ovulation and further implantation of the egg can vary. In addition, much depends on mood fluctuations, stress, age-related changes, concomitant ailments, immunity and even from atmospheric influences.
Doubtful results are possible, including due to the poor quality of the tests, the expiration of their shelf life, their incorrect use, or too early. It is undesirable to drink too much liquid on the eve of the test - this can significantly reduce the concentration of the hormone in the urine. The results may also be affected by the presence of certain hormonal changes in the body, the use of anti-sterility drugs.
To get a reliable result, the main thing is to follow certain rules when conducting a pregnancy test after ovulation. It is necessary to carefully study the instructions, do not allow dirt and moisture to enter the test, do not touch the place of application of the reagent, do not use the indicator at the end of its storage period. If everything is done correctly, then it is quite possible to rely on the test result. Good luck, future moms!
When to do a pregnancy test after ovulation
Fertilization women - This is an amazing process that gives rise to a new life. Already after 3-6 hours after sexual intercourse in the period of ovulation, we can safely talk about the beginning of pregnancy, if the sperm cell penetrated the egg cell. Lightning in the body of a woman begins a variety of chemical processes that reconfigure the body to preserve pregnancy.
But a woman is interested in something completely different - when to do a pregnancy test after ovulation? After all, we all know that the pregnancy test responds to a special hormone of pregnancy in the urine of a woman - hCG, which, after implantation of a fertilized egg, begins to actively double in each day.
Implantation of a fertilized egg occurs about a week after fertilization. Exactly from this period the real pregnancy begins. The implantation itself lasts about 40 hours, but somehow it just happened, the zygote cells begin to divide very quickly. Blood vessels appear, which will eventually become the placenta, and the body of the future man is formed from the embryonic nodule.
After ovulation, a pregnancy test with a determination of the concentration of the hormone hCG within 10 mU / ml (in a non-pregnant woman this hormone varies from 0–5 mU / ml) can be already about 12-14 days, i.e. before the actual delay. For many women, already 4-5 days before the delay, the test shows a weak second strip, which means that such lucky girls can be congratulated, very soon they will feel all the charms of their interesting position and after 9 months will become mothers.
Comments: September 09, 2007 - 13:44 | BabyPlan.ru in Pregnancy Planning
For many women planning a pregnancy, the question arises: when can a pregnancy test be performed to see 2 treasured stripes? Test makers, doctors, and friends are advised not to do tests until the delay. Let's see why and try to calculate the probability of a positive pregnancy test depending on the DPO (the day after ovulation).
For our calculations, we take as a basis a pregnancy test with a sensitivity of 25 mUI. The test responds to the presence of pregnancy hormone hCG in the blood of a woman. With a sensitivity of 25 mUI, the test is able to show a positive result, if in the woman's urine, the hCG hormone has exceeded this level, i.e. is above level 25 mUI. You need to know that the hormone hCG appears immediately after embryo implantation into the uterine wall, first in the blood, and a little later in the woman’s urine, and implantation in turn occurs 7-10 days after ovulation. But it should be borne in mind that the hormone level does not jump immediately after implantation to 25 mUI, but rises gradually, increasing every 24-48 hours by 2 times.
To better understand how the hormone hCG grows in the first days after implantation, look at the graph (the growth of the hormone hCG is marked with a green line):
Suppose that the implantation occurred on the 7th day after ovulation and assume that the hCG level “jumped” to 2 mUI on that day. The next day, the level of hCG doubled and is "whole" 4 mUI. At 9 DPO doubling again and 8 mUI. Although the pregnancy has already come, but for the test with sensitivity from 25 mUI, the hormone level is still very low, so the test will still be negative. Only on day 11 after ovulation, the level of hCG crosses the 25 mUI border for the first time and the pregnancy test may for the first time show a weak second strip. In our calculations, we do not take into account the fact that the content of hCG in the urine may be much lower than in the blood and for each woman this level is individual.
Now imagine that the implantation did not occur at the 7th DPO, but only on the 10th (also the norm!). This means that according to our calculations, the first strip can be seen only at 14 DPO. So we got to the definition of the delay and the answer to a frequent question: "After how many days you can do a pregnancy test? ". Usually the length of the second phase is about 14 days and that is why test manufacturers advise to carry out pregnancy tests only after a delay, that is, at the earliest at 15 DPO.