After how much from conception the test shows. How many days before taking a pregnancy test? — The long-awaited day of X. How many days after conception can I take a pregnancy test

When a couple tries to conceive a child, women usually begin to get nervous with impatience before the delay and are tormented by the question of whether it worked out or not. Some people buy a bunch of tests and carry out diagnostics every day, wanting to find the cherished stripes that indicate a pregnant result. But test devices are often not able to detect conception so early. It is especially important for such impatient ladies to know on what day after conception the test will show pregnancy, so as not to torment themselves and their spouses with meaningless doubts and useless testing.

All test products work on a similar principle:

Certain zones on them are impregnated with a chemical reagent;
The control value strip always appears when a biomaterial (i.e. urine) enters it. It is needed to confirm that the test works;
The device can show a test strip only when human chorionic gonadotropin, the hormone of pregnancy, is present in the urine.

HCG is found in urine only in pregnant women after the actual attachment of the egg to the endometrium, which occurs approximately 3-14 days after the ovulatory period. Therefore, all manufacturers of such express diagnostic tools warn that only if there is a delay, you can do a pregnancy test.

Any of the existing home tests will be able to detect hCG at its concentration above 25 units. The hormone reaches similar indicators approximately on the fifth day after fixing the female fertilized cell in the uterus. Implantation of the egg can occur as early as three days after ovulation, then the test will detect conception a few days before the delay. But in cases where fixation occurred after two weeks, it will be possible to confirm conception through home express diagnostics only after a delay.

Optimal timing of express diagnostics

It makes no sense to test a week after ovulation, since at such times no test is able to detect pregnancy. It is impossible to calculate the presence of pregnancy during this period by blood, because the circulatory system and the egg have no relationship. But a woman can suspect an interesting situation a week after conception due to specific changes taking place in her body these days, for example, excessive swelling and swelling of the mammary glands, sudden changes in the psycho-emotional state from euphoria to hysteria, taste changes or lack of appetite.

Similar symptoms are typical for premenstrual syndrome, but they also characterize the onset of pregnancy. But it is still impossible to confirm or refute the fertilization that has occurred, so you will have to be patient. When the required period has elapsed after the ovulatory period, diagnostics can be carried out.

It is useful to know how many days after conception a diagnosis can be made. Experts consider the next day after the start of the delay to be the most optimal time for research. The delay is considered the very criterion when it is possible to obtain reliable results. But even these days, doubts can arise when the second line on the strip is barely noticeable.

Rules for holding

So, the cherished meeting of the sperm with the cell took place in the tubes, after which it goes to the uterine cavity, in which it must gain a foothold. And yet from what day of conception will pregnancy be determined? Experts remind that hCG increases so much that it is shown by home express diagnostics only after the zygote is fixed in the uterus, that is, after a week after fertilization. In order for testing to be error-free, it is recommended to follow a number of recommendations.

Purchase high-quality test strips and other home diagnostic tools. A test that does not show a single line is discarded, it is damaged or expired.
The delay does not always indicate an interesting position. Even in healthy women, cycle failure can occur, especially after 30, which is due to problems with the ovaries. Therefore, there is no need to criticize the negative result of the test carried out from the first day of the delay.
Don't forget to read the instructions. Even if you know exactly how to use the testing tool. Different manufacturers may have different requirements for the study, which will immediately affect the reliability of the results.
It is quite possible to get pregnant during menstruation, therefore, if there is a delay after such sexual contact, then it is worth suspecting something is wrong and undergo home express testing.
You can measure the level of basal temperature for several days. If its indicators exceed the 37-degree mark, then this may indicate a positive result, i.e. pregnancy.

If there are doubts about the test results, then it is necessary to sign up for a gynecological examination with a blood test to determine the amount of human chorionic gonadotropin. In addition, ultrasound diagnostics is prescribed, which will tell for sure whether the patient is pregnant or not.

Testing transcript

Test tools are actively used by most modern women, they are available at any pharmacy and do not cause any difficulties when using. We found that after conception, you can do a test in about a week. But it is better to examine the urine for hCG on the second or third day after the delay.

A false positive reaction often occurs, especially with an insufficient level of human chorionic gonadotropin, which is associated with an early gestation period. The error may show a faulty device, low quality or expired. If you neglect the instructional recommendations for using test devices or use a portion of non-morning urine for diagnosis, then errors are also likely.

If there is a pregnancy, and the test devices cannot determine it, revealing a negative indicator, then the causes of the error may be due to the low quality of the reagents used in the manufacture of the test, ectopic pregnancy, etc.

Other pregnancy tests

In addition to testing to determine conception, many couples who are trying to get pregnant for a long time carry out a compatibility test to conceive. This is a postcoital study, during which a number of requirements must be met.

Three to five days before testing, spouses need to give up sexual intimacy.
The study should be carried out in a couple of days or directly in the ovulatory period. Therefore, you first need to identify the exact date of ovulation, for which experts recommend using basal measurements or special strips to calculate the ovulatory period.
After the completion of sexual intimacy, a woman should lie down calmly. You can take a shower, but you can’t just wash yourself categorically.

The essence of the postcoital compatibility test is that a bio-sample of cervical mucus is taken from a woman after a 6-12-hour period after sexual intercourse. Such diagnostics makes it possible to determine the specifics of sperm motility, the quantity and quality of the seminal biomaterial, and the structure of cervical mucous secretions. It is better to conduct several such studies, because there is a high probability of a shift in the ovulatory period, which leads to erroneous results.

If the mucosa captures more than 20 sperm, then the sexual partners are perfectly compatible. Incompatibility is determined when the test shows a negative attitude of the mucosa, although in itself it has excellent characteristics.

Such testing is simply necessary for couples who cannot successfully conceive a baby for a long time. A woman conducts a bunch of tests every month to determine pregnancy, but she can’t wait for two strips. According to statistics, the causes of such idiopathic infertility are the banal incompatibility of sexual partners. The probability of such a diagnosis is especially high in spouses who have excellent health, but who cannot achieve pregnancy. It is simply necessary for such couples to make a test of this kind.

Scientists have proven that if a couple has gene matches, then the risks of pathologies of genetic origin in their baby increase. This factor explains why blood relatives have children with various pathologies. Therefore, common genes can also be considered as incompatibility of sexual partners according to hereditary principles.

You can do a pregnancy test and compatibility testing of spouses only on certain days of the cycle. This is the only way to obtain data that is as accurate as possible, and not an erroneous result.

Almost every woman at some time in her life has experienced doubts about the onset of pregnancy, which could occur during unprotected intercourse. In the case when the probable date of conception is known, only one task remains - to determine after what time a pregnancy test can be done.

The principle of determining the pregnancy test

All known pregnancy tests work the same way. A reagent applied to a certain area of the device, acting with a woman's urine, determines the presence of the hormone responsible for pregnancy - human chorionic gonadotropin (abbreviated hCG). This substance is present only during a woman's pregnancy or, in rare cases, with certain organ dysfunctions.

The chorion (placenta) begins to produce hCG only when the fetal egg is fixed inside the woman's uterus, and during an ectopic pregnancy outside of it. This happens only after a certain number of days after the probable conception. During this period of time, the embryo moves from the ovary through the tube into the uterine cavity. During the period of its movement in the body of a woman, there are no significant changes, and the "hormone of pregnancy" is also not yet produced.

Based on the foregoing, in the very first 7-10 days of the probable onset of pregnancy, it makes no sense to conduct a test. His result during this period will always be negative.

You also need to know that conception does not necessarily occur during intercourse. Spermatozoa can remain in a woman's body without dying for several more days, waiting for ovulation. So, when determining how long after conception testing will be indicative, this fact must also be taken into account.

Which test to choose

An important criterion in assessing the probability on which day after conception the test will show pregnancy is the choice of the test itself. The difference in this case is the sensitivity of the device to the hCG hormone. This value usually ranges from 10 to 25 mIU / ml and means what is the lowest content of the hormone in the urine that the test can detect.

The lower the sensitivity value, the more accurately the test will be able to determine the presence of pregnancy. If the value of 10 mIU / ml is indicated on the package, this is the most accurate device, since no test shows a lower hormone content.

This was not done by chance - the urine of a non-pregnant woman may contain a small amount of hCG. If the tests could detect any small presence of it, often the result would be positive even without pregnancy.

When choosing a high-precision test, it is possible to conduct a study on the 7th - 10th day of the course of a possible pregnancy, and with its low sensitivity, only after 12 - 14 days. These times are the minimum for testing.

If the test is negative during the procedure in the first weeks after ovulation, this may not be definitively true. In this case, it is necessary to repeat the procedure with another test, waiting 3-5 days after the first one.

With a positive test, even in the early stages, there is a 99% chance that there is a pregnancy. If at the same time its first signs began to appear, there can be no doubts for sure. Even if the second strip is very light and barely visible, this can also be considered a positive answer, it's just that the period is still short, and the hCG hormone is present in a small amount.

Influence of the menstrual cycle

In order to more accurately find out the best period for the test, it is also necessary to take into account the characteristics of the body. All women have different menstrual cycle lengths:

Short cycle (duration less than 24 days). In this case, ovulation occurs less than 12 days before the onset of menstruation. And conception also occurs around the same period. In general, such women should practically not try to determine pregnancy before the delay occurs, because the period will still be too short. And after the delay, you still need to wait 3-4 days, and only then carry out the test.
Average cycle (from 24 to 32 days). This is the average parameter that most women fall under. In this case, it is possible to determine pregnancy from the first days of waiting for menstruation.
Long cycle (more than 32 days). It would seem that with a long cycle, the gestation period before the delay will already be sufficient. But, basically, ovulation in such women does not occur in the middle of the cycle, as is usually the case, but occurs with a slight delay. Thus, it is also desirable to carry out the test no earlier than the first day of the expected menstruation.
Irregular cycle. Sometimes the number of days between periods can be variable. In such a situation, it is difficult to correlate the timing with the delay, since predicting menstruation is not possible. Here, of course, it is easier to start from the estimated date of conception, and conduct a study after at least two weeks after it.

In any case, it is advisable to carry out the test as late as possible in order to avoid incorrect results. It is not necessary to do it in the very first days, when it is already possible - the shorter the period, the lower the probability of the reliability of the answer received.

How to test correctly

If you do not follow the elementary instructions, then, even taking into account all the factors, you can get the wrong result. Basic rules to know:

Most revealing is urine collected in the morning. Its concentration is usually higher.
Before testing, you should not drink a lot of fluids and take diuretics so that the urine is not diluted.
Before using the test, be sure to read the instructions.
It is necessary to ensure that the test liquid gets only on the required area of the test, without affecting its main part.
The device should not be expired, if so, its use does not guarantee the correct result.
All tests are for single use and cannot be reused.

If these instructions are not followed, the test can be both false positive and false negative. This can be misleading and the interpretation of the received response will be incorrect.

conclusions

Summing up all of the above, it is worth identifying the main factors affecting how many days after conception the test will show pregnancy. Here is their list:

After sexual intercourse, conception can occur within a few hours to 5 to 7 days.
In the first 7-8 days after the alleged conception, the tests are not indicative, because the “pregnancy hormone” has not yet appeared in the urine.
If you focus on menstruation and their delay, you need to take into account the length of the menstrual cycle.
Be sure to consider the sensitivity of the selected pregnancy test.
If used incorrectly, the device may show an unreliable result at any time.

Based on the average data, it is possible to determine pregnancy with a test already 12 to 15 days after conception. Usually this period falls on the first days of the menstrual cycle. For greater efficiency, do not test before the delay begins. In case of negative results for a short period, it is recommended to repeat the study after 3-5 days.

There are times when a woman needs to know whether conception has occurred or not, as early as possible. At the same time, some are trying to switch to a healthy lifestyle, start eating right and healthy, walk and relax more and eliminate all possible risk factors from everyday life. But, unfortunately, there is another situation when they want to get rid of pregnancy. And in this case, it is also necessary to find out about her presence as soon as possible.

If a woman knows the exact date of the alleged conception, she is already “sitting on tests”, waiting for the moment. But when can a test be carried out so that the results are reliable? Of course, it is advisable to do testing after the onset of a delay in menstruation. But modern technology allows you to test even before the delay. To do this, you need to buy, but you should definitely take into account that the probability of an error in this case is still greater than with a later diagnosis.

So, fertilization took place, the egg moves to the uterus and settles on its wall on the 7-10th day. From this moment, the hormone gonadotropin begins to be produced in the woman's blood, which allows the test to recognize pregnancy. It should be noted that the concentration of hCG necessary for this will be reached only after a few days. In addition, it is much lower in urine than in blood. Therefore, there is no point in testing earlier. However, it is often indicated that with a certainty of up to 99.9% it shows pregnancy as soon as possible - already on the 6-7th day after conception, in some cases - on the 10th day. But doctors say that at such a short time this is possible only with the help of a blood test for beta-hCG.

However, practice shows that in many cases, highly sensitive tests are able to respond to gonadotropin much earlier than menstruation should begin - all individually. Therefore, you can do the test as early as 10 days after ovulation, if you know its exact date. Many women claim that the tests determined their pregnancy within a week after conception. The lower the sensitivity threshold of the test, the earlier it can be applied. But in this case, the probability of obtaining erroneous results increases.

Still, it is better to wait for menstruation and only in case of a delay do a test. And after its carrying out - to pass or take place consultation at the gynecologist. When confirming pregnancy, the doctor must exclude its pathological development and put you under observation - to ensure a successful pregnancy.

Especially for- Elena Kichak

A pregnancy test after how long the result will show is the main question that interests women before trying to self-diagnose pregnancy. However, there are other nuances that a woman who wants to use it should be aware of. For example, the fact that not every test is equally good. And also at home?

If the onset of pregnancy is highly undesirable, and a woman needs to find out about her at all costs as soon as possible, using an ultrasensitive test, she will be able to get an answer of interest even before a delay is detected.
Gone are the days when women were tormented by doubts: whether the long-awaited or vice versa, unwanted pregnancy had come. Modern science has made life easier for women by creating pregnancy tests. Let's take a look at what tests are available.

Tests can be of the following types: tablet, test strips, inkjet. All of them have the same principle of action - the chemical reaction of the reagent impregnated with the test and a certain hCG hormone present in the urine of a woman.
The most accessible of the tests, but less accurate is the test strip. It is lowered into a container with urine and waiting for the result in the form of colored strips.

The tablet test is more complicated, here you need to have a pipette with you, with the help of which urine is injected into one of the two windows of the test. The result becomes visible in another window.
However, the inkjet test is considered the most convenient test. Here, no additional devices are needed, no pipettes, no containers. When urinating, you need to hold the test under the stream and in a minute the result will be known.

How many days after conception will a pregnancy test show the correct result? Those who are eager to know about the onset of pregnancy in the near future after sexual intercourse without the use of contraceptives need to know that the female hormone hCG is not always present in a woman's urine. It appears only a week, even ten days after the "effective" sexual intercourse. Here is the answer for you - how long does the test show pregnancy?

That is, after sexual intercourse, during which pregnancy could occur, at least seven days must pass, and only after this period can pregnancy be tested. However, women should take into account the fact that after a week or even two this hormone in the urine may be insufficient, and then the test may show an erroneous, that is, negative result. Therefore, it would be nice to do a second test a week after the first, especially for those women for whom pregnancy is highly undesirable. In this case, you can not take risks and you need to play it safe.

In modern conditions, any woman is able to independently determine pregnancy without contacting a gynecologist.

For this, a rapid test is used. How does it work and at what time is it recommended to conduct a study? This issue needs to be looked into in detail.

Features of pregnancy tests

The principle of operation of any devices for diagnosing an interesting situation is the presence of simple indicators that react with a hormonal substance - chorionic gonadotropin. HCG begins to be rapidly produced when a fetal egg is introduced into the uterus.

There are several types of rapid tests:

Test strip: for research, a marker strip containing impregnation zones is used. If a woman is pregnant, when urine interacts with the reagent, 2 strips will appear, and if not, only one. To test, the device is lowered into the urine for 10 seconds, after which they wait for the result for 3-5 minutes.
Tablet test: more complex device. It looks like a flat plastic box with small windows. One of them is a urinal, where urine is introduced with a pipette, and the other shows the result of the analysis. After placing the biological fluid inside the tablet, the reaction of the reagent and chorionic gonadotropin occurs, followed by staining of the colorless tissue.
Jet: this is an elongated device with a receiving end, where there are many microscopic tubules. Through them, urine flows into the cassette of the device, where the reagent is placed. For testing, you do not need to prepare a special container. Place the receiving end under the stream of urine for a few seconds, and after 3-5 minutes, evaluate the reaction.
Digital test: it has a display where the result is displayed. If the girl is pregnant, the inscription "pregnant" will appear, and if not - "not pregnant". For testing, place the tip of the device in the urine and leave it for 3-5 seconds. Evaluate the result that appears on the screen.

The reagent for chorionic gonadotropin is applied to any type of test. If there is a sufficient content of the hormone in the urine of a woman, a positive reaction will appear. Depending on the device, special symbols appear: stripes, letters or signs. When hCG is not enough in the female body or it is absent, a negative result will come to light.

How many days after intercourse the test shows the result

No matter how much you want to know if you are pregnant or not, you will have to be patient and wait a bit. Chorionic gonadotropin begins to be produced in the female body after the attachment of the fetal egg to the wall of the uterus.

After unprotected sexual contact, fertilization does not occur immediately: 5-7 days must pass. Keep in mind that with the onset of the specified time, the concentration of hCG in the urine is minimal, and the test will show a negative or doubtful result.

If you are impatient to get the result, test immediately with the onset of the expected period delay.

How many times is it better to do research? Experts recommend purchasing 2-3 devices to accurately confirm pregnancy.

How long will the result be most accurate?

Undoubtedly, you are interested in the question: how quickly after unprotected PA can pregnancy be diagnosed?

Imagine that a woman has a standard cycle of 28 days. A mature egg will leave the follicle on the 14th day. When a female reproductive cell meets a spermatozoon, conception occurs. The fertilized egg enters the uterine cavity and on the fifth day is implanted in the uterine wall.

When pregnancy occurs, if counted from the first day of the menstrual cycle, about 19 days from the date of the last menstruation, hCG begins to be produced. The concentration of the hormone doubles every day, and on the 23-25th day of the cycle it will reach 32 mIU / ml.

The indicated content of the substance will be just enough for an accurate diagnosis of the "interesting situation". A positive result will appear on the rapid test.

When a woman goes through the IVF procedure, it is best to diagnose pregnancy no earlier than 2 weeks after embryo transfer. In case of successful embryo transfer, the device will show the coveted stripes.

At what time of ectopic pregnancy the test will show the result

With various pathologies of the fallopian tubes, due to which the patency is impaired, there is a threat of developing an ectopic pregnancy. This is a condition when a fetal egg is attached to the wall of the tube, neck, ovary, or abdominal organs.

Ultrasensitive tests are able to diagnose fertilization already a week after implantation. However, a second dim, pale stripe will appear on the device. Sometimes the analysis shows a negative result.

With ectopic pregnancy, there is a failure in the flow of chorionic gonadotropin into the urine. Its content is not enough for normal interaction with the reagent. A few days later, when the concentration of hCG in urine should increase markedly during uterine pregnancy, the express test will also show a fuzzy line without becoming more noticeable.

If you note that the dynamics of the study are abnormal, this is cause for concern. Be sure to consult a doctor to understand the situation and stop being nervous.

The doctor will prescribe a blood test for hCG: in the early stages of gestation, its content there is higher compared to urine. The specialist will also perform an ultrasound to confirm pregnancy and determine the location of the crumbs.

When is it more likely to get an accurate result?

Ovulation occurs about 2 weeks before your period. If conception occurs, after 5-7 days, the fertilized egg is implanted in the uterus and begins to produce hCG. If you calculate, then the substance is produced by the day of the expected menstruation. After the introduction, the concentration of chorionic gonadotropin increases by 2 times every day.

Suppose a fertilized egg is attached on the 7th day after ovulation, the hormone content increases to 2 mIU / ml. The next day, the value of the substance rises to 4 mIU / ml. By day 9, it will reach 8 mIU / ml. Even ultrasensitive tests are unlikely to be able to diagnose pregnancy, as they detect hCG at a concentration of 10 mIU / ml.

Let's continue counting. On day 11, the hCG content will increase to 32 mIU / ml, and all express tests can determine conception. If ovulation occurred later, a positive result will also come later.

What day to do the analysis depends on the type of express test and quality:

when its sensitivity is 25-30 mIU / ml, pregnancy can be checked when the first day of missed menstruation occurs;
if the sensitivity of the express test is higher and is 15-20 mIU / ml, it is possible to confirm fertilization two days before menstruation;
at a low sensitivity threshold, the device determines the concentration of hCG in the urine at 10 mIU / mg. Pregnancy is diagnosed 4 days before the expected period, however, there is a high probability of obtaining a false result.

At early gestational age, the effectiveness of rapid tests ranges from 97 to 99%. In order not to get a negative or questionable reaction, manufacturers recommend always testing after a missed period. If you purchased a non-defective product, the procedure will become reliable in most cases.

The specialist tells about the timing and features:

Conclusion

When pregnancy proceeds without pathology, rapid tests determine its onset correctly. Sometimes some women violate the instructions for use and diagnose ahead of time, getting erroneous results.

If you want to accurately determine whether conception occurred after unprotected intercourse, do the study only with the onset of a delay in the expected menstruation, when the concentration of chorionic gonadotropin rises to the required level.

If you receive repeated positive tests, be sure to contact your gynecologist to confirm pregnancy and register.

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