Expectant mothers want to know that the family will soon become larger as early as possible, so they often visit the forum and antenatal clinic they are wondering when they can take a pregnancy test. You can find out about conception by visiting, donating blood or doing an ultrasound. However, women often prefer the test - it is quick, simple and a budget option find out if pregnancy has occurred. However, many people are concerned about how accurate the test is, and at what day of delay does the test show pregnancy?
Test options
One of the most popular options is the strip test. It is a strip on which hCG antibodies are applied. From the 1st day of delay, the Evitest No. 1 or FRAUTEST Express test (made in Germany) can already show the correct result.
Tablet tests work in a similar way. They look like a small box with 2 windows. If in the first option the strip is dipped to a certain level in a container with urine, then in this case, using a pipette (it is included in the kit), you need to apply 4 drops of urine into one window - after a few minutes, 1 or 2 strips will appear in the second window.
Inkjet tests are characterized by high accuracy. They are simply placed under a stream of urine. You can determine that conception has occurred using a Clearblue, Frautest Comfort, or Evitest Perfect pregnancy test. This good tests, they are reliable. How long after can I take a pregnancy test using these products? Already on the 1st day of the delay, the test will show pregnancy. Their only drawback is their high price.
Mechanism of operation
A rapid pregnancy diagnostic test can be purchased at a pharmacy. To understand when you can take a pregnancy test, you should know how they work. The tests are produced by different manufacturers, but they all have the same operating principle: they detect the presence of human chorionic gonadotropin in the urine.
Note. Human chorionic gonadotropin is a hormone that is produced after the embryo attaches to the uterus. The reaction to the presence of the hormone is manifested by the appearance of a second line on the test.
On forums you can often find the question on what day the test showed pregnancy. Answers vary, but experts insist that in case of conception, the test will show pregnancy after a delay - before that the probability of a reliable answer is low. The effectiveness of the test is also related to the period that has passed since the day of conception. Immediately the level of hCG in the urine is low, so no reaction occurs, but gradually this level increases, which leads to the fact that when the test interacts with the test material, a second strip appears.
Despite the fact that the principle of operation of the tests is the same, the day on which the result will be reliable differs. This is due to the fact that they are characterized by different sensitivity indicators. Most tests indicate a reading of 25 mUI of hCG. Some use 10 mUI hCG, but most experts insist that this is just a publicity stunt. You should also not buy tests whose manufacturers insist that you can do a pregnancy test before the delay with a 100% guarantee of accuracy.
How to conduct the test correctly?
The accuracy of the test depends on the timing of the test. Of course, you cannot find out about pregnancy immediately after sex. It is necessary to count a certain number of days after ovulation.
Note. In many ways, the reliability of the result will depend on whether it is regular.
Expectant mothers want to know even before their menstruation is delayed whether conception has occurred. For this purpose, they buy tests from companies that have best reviews by sensitivity. However, not always even the most sensitive sample can recognize the presence of hCG before the delay.
Therefore, if you want to receive the necessary information as early as possible, you need to understand on what day of delay the test will show two stripes. Usually the duration of the menstrual cycle is 28 days. If you do a test on day 23, then none of the tests, even those characterized by the highest sensitivity, will show a reliable result, since the level of human chorionic gonadotropin is too low. It is not always possible to find out about pregnancy even on the 26th day - it all depends on the day of conception and the length of the cycle.
When should the procedure be carried out? Test manufacturers claim that after a delay, the procedure can be carried out on the first day, since the level of the hormone reaches the level that is detected by the tests. However, experts recommend waiting another week, then the test will definitely show pregnancy.
How many days later can a pregnancy test be taken if the date of ovulation is known? In a regular cycle, the egg is released in the middle of the cycle. Accordingly, if menstruation occurs on the 30th day, then the egg is released on the 15th, if on the 28th, the egg is released on the 14th day. Fertilization of the egg occurs over the next 2 days. However, after this, more time must pass: on the 4-5th day, the fertilized egg will attach to the uterus. Therefore, a blood test for hCG will show changes on the 22nd day of the cycle.
On what day of the cycle can the test be used? The use of a highly sensitive test may indicate increased level HCG no earlier than 4 days before menstruation. Therefore, with a 30-day cycle, it is not advisable to carry out analysis earlier than day 26. Although there is a fairly high probability that the test will be negative at this point. With a 28-day cycle, you can do a test on the 24th day of the cycle.
If you have an irregular cycle, you can try to determine the earliest time for testing if you know the exact date of ovulation. You can determine the day of ovulation using several methods:
- using a special ovulation test;
- tracking basal temperature;
- based on the occurrence of signs of premenstrual syndrome.
If the day of ovulation is known exactly, then 12 days should be added to it - after this period, hCG is detected in the blood. Tests done correctly can show results on the 15th day. Now it is clear at what period the test can be reliable and why.
Note. However, all these figures are very arbitrary and focusing on them cannot guarantee reliable result. You can get an accurate answer by waiting 3-5 days after the delay.
Sometimes even after pregnancy occurs, menstruation does not stop. It is advisable to perform a pregnancy test after or during menstruation, especially if menstruation differs in volume and duration from usual. A pregnancy test during menstruation can be done on any day - the presence of blood will not affect the reliability of the result.
Carrying out a test during lactation
Regardless of the test result, if you notice any symptoms that are quite typical during pregnancy, then it is better not to delay going to the doctor Lack of pregnancy in the first months after birth is normal occurrence from a physiological point of view. However, there are cases when a woman becomes pregnant while breastfeeding. For a woman, this situation may come as a surprise. To avoid it, experts recommend testing every month until menstruation begins.
Insemination and IVF
Pregnancy does not always occur naturally. If certain difficulties arise at the planning stage, the conception procedure can be carried out without sexual contact, by inseminating active sperm into the uterus, or by implanting an already fertilized egg (IVF). Women who become pregnant after the insemination procedure can take a pregnancy test after 18 days, since all processes are similar to natural fertilization. A blood test can show pregnancy as early as 14 days.
Sometimes pregnancy stimulation is carried out, in which hCG injections. It is clear that in this case the hormone will be detected during the test, so it is not advisable to carry out the analysis earlier than 15 days later.
When using in vitro fertilization, no differences from the natural process in subsequent development are observed either. When the embryo implants after IVF, hormone production will begin, so after implantation, the test can be performed 2 weeks after the procedure.
Carrying out the test
Manufacturers do not provide information on when it is best to take a pregnancy test. It is believed that the result will be the same regardless of time. However, experts advise doing a pregnancy test in the morning, using urine collected overnight for analysis.
A pregnancy test cannot always be taken during the day. Basically, the limitation concerns the test at the earliest stages, since during the day the urine is less concentrated, and the test may not respond to changes or show a very weak, almost imperceptible second line. If you are wondering whether it is possible to take a pregnancy test in the evening before your delay, then you shouldn’t, because... the result will be negative.
Note. To increase the accuracy of the result, you must not go to the toilet for 4 hours before taking the test, and also try to drink less liquid - then the urine will be more concentrated.
As for more late dates, when the hormone level is already high enough, the performance will not be related in any way to the time of day. Therefore, the answer to the question whether it is possible to take a pregnancy test during the day or in the evening is positive.
Negative result
Any woman planning a pregnancy wants to see positive result dough - 2 strips. However, these expectations are not always met. Can a test be negative if pregnancy has occurred? A question that often interests women.
This situation is possible. The most simple option is low hCG in the mother’s body. This is an individual indicator, so even several weeks after the delay, the test may not show a second strip. Such situations should be taken seriously: they may indicate either hormonal disbalance. However, pathology does not always need to be suspected. Sometimes the test simply does not have the necessary sensitivity to detect the hormone, while pregnancy progresses normally.
There are also opposite situations: when the test indicates pregnancy, but the result is not true.
This may happen in the following cases:
- the woman took the test within two months after giving birth;
- dysfunction of the ovaries;
- the presence of a hormone-producing tumor;
- using expired test.
Ectopic pregnancy
In an ectopic pregnancy, implantation of the fetus occurs outside the uterus. However, this does not affect the production of the hormone, although it is produced more slowly. Therefore, the test may still be positive. An examination by a gynecologist or an ultrasound will help rule out the development of an ectopic pregnancy. There is also a special Inexscreen test that will indicate that there is an increased risk of ectopic pregnancy.
At a certain point in life, a woman may begin to suspect pregnancy.
The first thing you can do in such a situation is to purchase a special test at the pharmacy, which in an indicator form will show the likelihood that the woman will soon become a mother.
In some cases, when the content of human chorionic gonadotropin is still too low for it to show the correct result.
If fertilization occurred very recently, it is possible. In this case, you will need to do another test in a few days.
Fertilization is a complex process that takes place at the cellular level. For a woman, it proceeds completely unnoticed.
(even before the delay) can appear after the egg, after fertilization, has reached the uterus and attached to it.
Usually the uterus is attached one week after conception. The fertilized egg fuses with the wall of the uterus (its upper part) on days 21-23 of the menstrual cycle.
A fertilized egg already consists of several cells that join together into a single whole. They divide and form a whole cell cluster. As the cells increase in size, the size of the egg also increases.
As a result, one of them will become an embryo, and the rest will be used to nourish and protect it throughout the pregnancy.
Change in hCG level
HCG is human chorionic gonadotropin (hormone). Immediately after the transfer of a fertilized egg to the uterine wall, it is formed in the body of the expectant mother. The body needs the hormone until the placenta forms. In the initial stages, it stimulates the production of other important hormones.
It is one of the most detailed analyzes in the twelfth week. For this purpose, urine tests are performed. A pregnancy test may be used.
Hormonal levels change as pregnancy progresses. Until the 12th week it grows (doubling every 48 hours), and then there is a sharp decrease.
The information is reflected in the table below.
| Gestational age | HCG level |
| 0 - 1 | 5 - 25 |
| 1 - 2 | 25 - 156 |
| 2 - 3 | 101 - 4870 |
| 3 - 4 | 1110 - 31500 |
| 4 - 5 | 2560 - 82300 |
| 5 - 6 | 23100 - 151000 |
| 6 - 7 | 27300 - 233000 |
| 7 - 11 | 20900 - 291000 |
| 11 - 15 | 6140 - 103000 |
differ not only in their functionality, price and appearance.
The main criterion for choosing all pregnancy tests is sensitivity.
It is this indicator that determines on what day after ovulation a test should be taken to confirm pregnancy
- Tests with standard sensitivity from 25 mIU/ml.
The higher the number characterizing the test, the less sensitivity it has.
These include test strips and cassette tests. As well as digital tests that show the gestational age, in particular the famous Clearblue Digital test.
- Tests with average degree sensitivity from 15 to 25 mIU/ml, for example Fraytest.
- Ultrasensitive tests with readings from 10 to 15 mIU/ml.
An example is the Insure test that recently appeared on the pharmaceutical market (sensitivity 12.5 mIU/ml) or the “ Ambulance"(sensitivity 10 mIU/ml).
Sensitive tests can show pregnancy 5-7 days before the missed period.
A paper strip test is the most inexpensive option for detecting pregnancy. They are impregnated with a substance that reacts to changes in the hCG hormone.
The operating principle of test strips is extremely simple. The strip is immersed in a container of urine for a few seconds. Then you need to wait 5-7 minutes and you can see the result.
When two red stripes appear, there is a high probability of pregnancy. After such testing, it would not hurt to use more modern means or undergo an ultrasound.
If the reagent is unevenly distributed over the surface of the strip, an incorrect result may be shown.
Cassette or tablet tests are also standard. They do not need to be immersed in a container of reagent. Such tests are cases with paper strips enclosed in them.
Enough for a strip a large number of reagent using a pipette, and the result can be seen in a special window in 3-4 minutes. The urine comes into contact with the reagent already present in the test.
Inkjet tests with high sensitivity contain special reagents, which, when detecting human chorionic gonadotropin in female urine, can show a reliable result within a minute.
No containers or pipettes are required to apply urine. This is an accurate and convenient option for detecting pregnancy.
As for digital tests, they are expensive, but they provide the same amount of information.
Unless the period is additionally calculated in weeks. Electronic tests are equipped with special intelligent sensors. If the result is positive, a “+” sign and the gestational age in weeks will appear in the window.
At what time can the test be done: from how many weeks does it begin to show an accurate result?
After the egg meets the sperm in fallopian tube and conception has occurred, active cell division begins in fertilized egg, and the zygote itself moves towards the uterus.
The fertilized egg descends into the uterine cavity only on the 6-7th day. The embryo can remain suspended for another 2 days, and then deepens into the endometrium.
From this moment, the level of hCG in the woman’s body begins to increase.
Considering that human chorionic gonadotropin doubles every 2 days, the most sensitive test will show pregnancy 10-12 days after ovulation.
Standard tests (sensitivity 25 mIU/ml) show pregnancy only from the first day of delay. But even in this case, the test may show a negative result in case of menstrual irregularities or late ovulation.
Regardless of sensitivity, the test will show an accurate result only on the 3-4th day of the menstrual cycle delay.
All test results before the delay are considered relative. Although if the result is positive, the chances are high that the long-awaited pregnancy has occurred.
Does the test always show an existing pregnancy?
Often when self-determination pregnancy through a test, the result may turn out to be false positive, that is, it will not be confirmed during another study. The test will show two lines if the child is not conceived.
An unreliable result may be a consequence of taking special medications with a high content of the hCG hormone or the presence of trophoblastic neoplasms.
The results may be false positive even after recent spontaneous miscarriage or abortion. In this case, even during menstruation, the test may show pregnancy.
The fact is that during this period of time the body still retains an increased content of chronic gonadotropin. Therefore, the results will be false.
You can specify the data and highlight the main reasons for a false positive result:
- use of hCG products. For example, Pregnil, Profasi and others.
- presence of tumors;
- minor elimination of soft tissue after early abortion.
Is the test always true: when may the test fail to show pregnancy?
The results of a pregnancy test may be false negative when fertilization of the egg has occurred, but it was not recorded due to the low level of the hCG hormone in the body.
Statistically, such results are obtained much more often than false positives.
Possible causes of erroneous data:
- Taking the test a little earlier due date when the body has not yet produced a sufficient amount of chronic gonadotropin.
- Excessive use of diuretics or fluids before the actual test.
- The test may not show pregnancy for a long time due to pathological condition kidneys, heart and blood vessels, in which the hormone is practically not excreted in the urine in normal concentrations.
- An expired or damaged test was used.
Determining pregnancy is possible in the early stages of conception, but only after the egg attaches to the uterus.
From this moment on, a special hCG hormone. It is its presence that is shown various tests, which differ in their level of sensitivity. Well, digital tests can immediately show approximate timing on the display.
In certain situations, test results may be erroneous - false positive or false negative. It is necessary to use only high-quality medical products to detect pregnancy and not test before the due date.
Every woman who cares about her personal health and the health of her future children should know what it is.
This test helps determine whether conception has occurred.
There are several types of tests: strip, tablet, inkjet, electronic.
Externally, these types differ, but the basis of the action of each is a reaction to one hormone ─.
It is this substance that begins to be produced in the body from the day of conception and is excreted in the urine. The hormone does not accumulate immediately, so the test does not react to its low level.
When is the best time to do it?
Often the instructions say that already on the seventh day from conception, which occurred in the middle of the cycle, you can get the result. But the hormone described above does not always have time to accumulate in the required quantity.
If the cycle irregular(each month there are a different number of days between menstruation), other rules should be followed.
In this case need to be taken into account when sexual intercourse occurred that caused possible conception. If two weeks have already passed, the test may indicate pregnancy.
It is also worth resorting to the test in the case when the minimum number of days for the cycle has already passed, and other signs of pregnancy appear.
Take a test before a delay only makes sense when menstrual cycle irregular. In all other cases it may be useless.
However shouldn't be trusted 99% accuracy of most tests, although such information can often be found on the packaging.
If at negative Menstruation still does not appear in the test, you need to wait a few days and repeat the procedure.
First negative result in in this case does not guarantee that there is no pregnancy.
Until there is an exact result, it is better to stop drinking alcohol, smoking and other harmful effects on the body (this can harm the already born fetus).
If the result positive, but the line does not appear clearly, the probability of pregnancy is very high. In a couple of days you need to take another test, during which time the hormone will have time to accumulate and the result will be more clear.
When suspicions about pregnancy are confirmed, the first thing to do is go to the doctor.
This will help determine early. Besides, future mom By registering from the very beginning, you will be able to avoid many problems with your health and the health of your baby.
If menstruation does not begin, and the test is once again negative, you should also consult a doctor who will help determine the causes of the menstrual cycle failure.
When to take a pregnancy test: morning or evening?
As already mentioned, the test determines the level of a special hormone in the urine. This hormone is secreted directly by the fetus.
Since a person does not eat or consume liquid at night, urine becomes most concentrated. The level of a specific hormone in this case reaches its maximum.
This is why a pregnancy test best to use in the morning, but not in the evening.
For better results, you need to use new, just purchased tests. However, when purchasing you should check the deadline suitability. Do not neglect the instructions, since each test has its own characteristics that should be taken into account.
Thus, the time of the test should be set depending on the regularity of the menstrual cycle. If it is regular, then the procedure should be carried out during the expected menstruation and later, but not earlier.
The test is done in the morning, which allows you to achieve a better result. In the absence of menstruation and any test result, you should go to the doctor.
If the cycle is regular, there is no point in doing the test before the delay begins. With each subsequent day, the reliability of the results will increase. However, it is better not to wait for weeks, much less months. In the first weeks of pregnancy, it will be easier for the doctor to help the mother and her unborn child avoid dangers.
If menstrual periods are unstable, you will have to wait a period of time equal to the longest cycle of the year. For example, if it lasted 34 days, then it is better to count the same number of days from the beginning of the last menstruation, and then just buy the test. Do you know the day of ovulation? 2 weeks after it you will be able to find out about your situation.
The situation largely depends on the type of test. For example, inkjet with a mark 10 mIU/ml is able to determine successful conception even 3 days before the expected menstruation. And products containing the inscription 25 mIU/ml, will be useless until the delay begins.
When is the best time to take a pregnancy test (hCG)
HCG is a hormone whose presence indicates pregnancy. It becomes noticeable in the blood faster and better than in urine. Therefore, a laboratory test shows the result earlier than most pharmacy ones.
Is the expected day of conception known? You can donate blood for testing a week after this date. If not, then the first day of delay will be the best reason to contact an antenatal clinic.
If the test results are inconclusive, the gynecologist will recommend donating blood again in a few days. Do you want to know the answer for sure the first time? Then it is advisable to donate blood for hCG approximately on the 3rd day of the delay. At this time, its concentration will become clearly noticeable.
Pregnancy test - when to do it?
Morning urine is considered optimal for donation - it is the most concentrated. Therefore, it is better to do tests immediately after waking up or at least before eating or drinking any drinks, including plain water. However, inkjet tests have increased sensitivity to hCG, so they can recognize it even in daytime or evening urine.
In individual cases, you can take the test regardless of the time of day. He is with more likely will show the truth if a woman at this moment feels:
- pain in the chest and/or nipples;
- cramps and/or nagging pain in the lower abdomen;
- nausea, weakness, dizziness;
- sudden desire eat something specific.
These symptoms indicate an active change hormonal levels. A test that “caught” such a moment will certainly show the truth.
How to take a pregnancy test correctly
General rules
- Make sure your hands are clean and dry before the procedure.
- Check the expiration date of the test.
- Buy products only in pharmacies.
- Adhere to the rules of storage and use described in the instructions for the purchased product.
- Keep the area where the test will be kept clean while the results are being displayed.
Stripes
They are the cheapest and easiest to use. To begin with, morning urine is collected in a dry, clean container. It is desirable that it be small, but with high walls. The strip is dipped into the liquid to the marked mark for 20 seconds. After this, it is better to place the test on a flat horizontal plane and wait a few minutes.
Results:
- one strip - not pregnant;
- two stripes - pregnant.
Tablet
Similar to the previous view. The difference is that the product comes with a pipette, and the indicator line is located in the body itself.
A small amount of urine is collected with a pipette. It is better to take it again from the container. Then a few drops from the pipette are left on the indicator located in a small hole on the body. All that remains is to wait.
Results:
- one strip - not pregnant;
- two stripes - pregnant.
Electronic
Its main advantage is that it can show the approximate date of conception. Procedure:
- remove the cap from the dough. At once proceed to the second step;
- place the object under the stream of urine for 5 seconds or lower its tip into a container with urine for 20 seconds;
- close the cap and place the product on a horizontal surface. You can also hold it in your hands, but make sure that the tip is pointing down and not up;
- wait until the final image appears on the screen.
Results:
- “not pregnant”, “no” or “-” - absence of pregnancy;
- “pregnant”, “yes” or “+” and numbers - pregnancy and the approximate period from the moment of implantation of the embryo.
Jet
It is valued for its accuracy, good response to hCG, and ease of use. After removing the cap, the tip is placed under a stream of urine. It is recommended that it be tilted downwards. Often the result appears right before your eyes in just half a minute. However, to be completely sure, it is better to postpone the test for 3-10 minutes.
Results:
- one strip - not pregnant;
- two stripes - pregnant.
How long before you take a pregnancy test after sex?
Fertilization of the egg occurs within 12 hours after successful sexual intercourse. However, it is impossible to determine this point using tests. In addition, it will take a week or more for the embryo to move into the uterus and implant into its wall. As soon as this happens, the production of the hormone gonadotropin will begin. It is he who helps determine pregnancy.
So, hCG appears in the body on average 7-10 days after conception. Then its amount doubles every 2-3 days. In the second or third month of pregnancy, its concentration reaches its maximum.
Accordingly, the test is done no earlier than a week after sex.
On what day of delay should I take the test?
If the cycle is regular, then you can buy tests already for 1-3 days of delay. If not, it is better to wait at least another 2-3 days or get tested several times with an interval of three days.
In cases where a woman does everything to get pregnant, she can try to find out the result even a couple of days before the expected menstruation. To do this, she will need an inkjet or electronic test, since other options are not sensitive enough for such a short period.
On the 7th day of delay in the absence of specific diseases and correct use any tests will reliably show whether a woman is pregnant or not.
When does the test show pregnancy?
The answer to this question is in the instructions, since each product is individual. As a rule, the waiting time does not exceed 20 minutes. Strips take longer, but inkjet, electronic and flatbed wands are quicker.
Another criterion is the gestational age. The smaller it is, the longer the result appears. In a test with low sensitivity, daytime and evening urine may generally give a false negative answer.
There is a separate category of cases involving test strips that are misleading. The product may not detect pregnancy after the indicated period of time. However, after an hour or even a day, a second stripe will appear on it. It does not necessarily indicate a successful conception. It is better to play it safe and go through the procedure again or contact a gynecologist.
The test showed a weak second line - why?
Most likely - low hCG level. Exit: wait 3 days and repeat the procedure. The amount of hormone will increase noticeably, and the strip will become brighter.
If the test has poor sensitivity, it is better to buy another one with a mark of 10 mIU/ml. Purchasing several products of different brands and batches or taking tests at a antenatal clinic will also help clarify the situation.
With the release of tests to establish " interesting situation“Representatives of the fair sex can learn about their new position from the first days of fertilization, much earlier than the gynecologist can establish this fact. So, what is the mechanism of functioning of the devices in question?
How does a pregnancy test work?
All tests have a similar mechanism of operation. When fertilization occurs, when the embryo attaches to the uterine walls, the body immediately begins to produce the pregnancy hormone, which is abbreviated as hCG. The device in question has a special strip where the reagent is placed.
When urine comes into contact with this substance, its color begins to change. This happens because there is a large amount of hCG in this liquid. The test can be carried out before the expected menstruation is delayed - the specified hormone is produced at early stages gestation. He originally appears in small quantities, and over the course of 14 days its concentration increases thousands of times.
There is no hypersensitivity in the usual test, so in the first week it does not show any reaction, because there are very few hormones. It is necessary that at least 10 days pass from the moment of fertilization. But there are other devices - inkjet. They are characterized by the highest sensitivity and make it possible to know the result a week before the start of the expected period.
Let us denote that the sensitivity level of most tests starts at 25 mUI. Some devices indicate that the test begins to be sensitive as early as 10 mUI, but this is difficult to prove.
Tests are divided into inkjet, plate, strip and reservoir systems. These tools vary in design, but the principle of their analysis is similar.
Test strips. They belong to the 1st generation of express diagnostic tools. They have a simple device, so their cost is the lowest. These tests are the most common among buyers and lead in sales. This paper strip, impregnated with a certain reagent. It needs to be placed in the urine for 15 seconds, and then, after pulling it out, the result will be ready in five minutes.
If the test is used correctly, the accuracy on the 1st day of delay exceeds 90%. A week after the absence of menstruation - from 95 to 100%. There is one strip on the test, which is the control line. Next, you look - if the second one is present, then this indicates your fertilization.
The advantages of this device are that it is not expensive and is sold at any pharmacy.
Of the minuses, it should be noted that the sensitivity, compared with other types of tests, is low - 25 mIU. To perform testing, you need to collect urine in a certain container, which is a little inconvenient - you need to take it clean to collect it. The results may be false, because the reagent is on paper, which does not allow it to maintain its exact concentration. This may cause insufficient results.
Another disadvantage is that if used incorrectly, the result may not be true. For example, if a woman overexposes it, this can cause the reagent to be washed off, and the second strip will not appear. If, on the contrary, the device was not held in place, then an insufficient amount of urine may be collected, and it will not report anything. Errors are acceptable if the technology in the manufacture of the product was violated, as a result - the strips are not evenly saturated with the reagent.
Their sensitivity is greater - from 10 mIU to 25. They are able to establish fertilization earlier. You need to use the pipette included in the kit to apply a drop of urine into the window on the device.
The device in question is much more convenient, but its cost is not low. They are used in hospitals for professional analysis. This is the structure of the device in question - there are two windows - urine is applied into one of them with a pipette that comes with the device. The drops begin to spread, reach the reagent strip (it is not visible to the eye) and begin to react with them. In the second window - the result. During pregnancy, the reagent will become colored. The device does not have the disadvantages that strip devices have.
Advantages - this device does not need to be immersed in liquid. To make the test more convenient to use, a special pipette is included with it.
Disadvantages - more expensive compared to test strips. In order for urine to be collected into a pipette, it must also be first collected in a clean container.
Jet. These devices are the most advanced today. They have more high level sensitivity and complex structure.
Such a device allows you to detect fertilization even with a small amount of hCG - 10 Mme per ml. It contains a layer of blue particles that attach to hCG when present in the urine. In a few minutes the result will be visible, it will be accurate, but the cost of these goods is significantly higher than other tests.
Inkjet devices are convenient to use, since they can be used in any conditions. To detect pregnancy, there is no need to look for a sterile jar. You just need to place one of the ends of the test under the urine, wait a couple of minutes and, voila - you have the result.
Also based on the principle of construction inkjet tests Ovulation tests were also done - the time when the possibility of fertilization is highest.
Inkjet test cassettes do not have such a simple structure. The rod consists of tubules; along this rod, the liquid begins to rise at high speed to the place where the reagent is located. The test system contains a layer of latex microparticles with antibodies to which hCG attaches well.
This device is super sensitive, even if the percentage of hCG is minimal, the test will not be mistaken.
Tank systems. These devices are very convenient, as they are equipped with a reservoir for collecting urine. There is a window on the back, and the test part is in the reservoir. The result of the test does not depend on the amount of urine in the container; the test begins to independently absorb the amount needed for testing and establishing an accurate result.
After some time, you can see the result in the test window.
Which test to choose?
Regardless of whether a woman wants a baby or not, she purchases a test in order to find out the answer that interests her. If her period is late, she can’t wait to find out quickly what caused it. Which test is better to choose?
Here are some tips to consider when purchasing a test:
- The reliability of the device depends on the quality of the diagnostic system. The result will be most reliable if the system uses a high amount specific antibodies and is ready to record the smallest amount of hCG.
- The name of a reputable manufacturing company - this fact in itself guarantees the quality of the test.
- Typically, the lower the cost of tests, the lower the quality of the reagents used in them and the lower the accuracy of the research will be.
- Package. It is important when choosing a test. It must contain all the necessary information about the test and its manufacturer, and the packaging must also have an expiration date and production date, batch number, and a telephone number for feedback. Test strips should not be thinner than 3 mm in width. The test must be completed with Russian-language instructions. Since all tests are highly sensitive to moisture, the package must contain bags that absorb moisture.
If your menstrual cycle is regular
In the middle of the cycle, an egg is released for fertilization. If the cycle is thirty days, then this process occurs on the fifteenth day, with a 28-day cycle - on the fourteenth day. Over the course of two days, fertilization occurs. After intercourse, she travels 5-6 days to the uterus. On the 22nd day of the cycle, an increasing pregnancy hormone can be detected. The highest quality tests can show fertilization 5 days before the potential menstruation, when the amount of hCG exceeds 25 mUI.
If your menstrual cycle is not regular
You can find out when ovulation occurred by:
- emergence signs of PMS;
- increase in BT level;
- ovulation test.
Having determined the number, you need to add another twelve days to it - then you can detect an increase in hCG in the bloodstream. After fifteen days, highly sensitive tests can be used.
Terms of use
- The test should be stored under the conditions written on the package by the manufacturer;
- It is important to follow the instructions - lower the device into the urine to a special mark, while the strip should remain in the liquid for the recommended time, no more. The result also needs to be assessed at the specified time;
- The container in which urination is carried out must be clean;
- before urinating, you need to perform hygiene procedures;
- The pack of tests must be opened immediately before use; it is forbidden to carry the open text for a long time and then use it, as its results will be false;
- The test must be carried out on night or morning urine;
- It is important to monitor the expiration date of the test so that it is not expired;
- The package in which the test is sold must not be damaged.
Negative result during fertilization
The percentage of the hormone produced during pregnancy increases differently for all women. During a two-week period after menstruation has not occurred, the device can notify you about negative result. If the test says there is no pregnancy, but the patient has no doubt that something is developing inside her new life, then this phenomenon has several explanations
If your period is late, this is not exact sign that a woman has become pregnant, because there are many factors that influence the menstrual cycle itself.
Initially, this can happen if a representative of the fair sex has some gynecological diseases (for example, inflammation of the appendages). This also includes not only serious, but also very frequent diets, depression, disruption of hormones, and intense physical activity. A woman should not experience stress often.
Regardless of the reason for the delay, the test will not determine the presence of pregnancy. Usually, once fertilization has taken place, you can get one stripe due to the quality of the test, as well as its misuse. It is important to adhere to the rules indicated in the instructions for use of the test. Also, a similar thing can happen for more complex reasons, which include deviations in the development of the child.
The most common reasons that provoke denial during fertilization are:
- Incorrect use of the device. In order for the result to be true and accurate, before starting to use the test, you must read the instructions included with it. At first, there is a risk of getting an incorrect result. False data can also occur if the test was stored in incorrect conditions, or if it is defective or expired.
- Testing for very short periods of time. This is the most common reason that the test does not show correct result. On early stages During pregnancy, too little hCG is produced in the blood. Almost always, an accurate result can be obtained about two weeks after conception. At the same time, some expectant mothers may experience disruptions to their menstrual cycle. As a result, all the indicated symptoms affect the amount of hCG. If after the study the woman has any remaining doubts, you can repeat the procedure after a couple of days. If even after this the result is not correct, then it is better to contact a doctor and take the tests he prescribed.
- Use of medications. This happens if the patient before the study consumed drinks with a diuretic effect or various medications. The fact is that diluted urine will contain a much smaller amount. In the early stages of pregnancy, it is recommended to carry out the test in the morning. If you drank a lot of liquid in the evening, you can get a negative test even in the morning.
- Presence of any violations. If you have discovered various illnesses that are related to work internal organs, then the test may indicate a denial of pregnancy. Initially, this will be associated with the presence of kidney disease, in which a minimal level of hCG is present in the urine.
- Disturbances in the development of pregnancy often occur in such a way that during pregnancy a woman’s periods do not stop, and testing will show a negative result.
In almost all cases, this process is associated with the development of an incorrect pregnancy outside the uterine cavity. False data can also occur if there are disorders in the development of the fetus. If there is a risk of miscarriage, fading pregnancy, placental insufficiency fetus If there is a suspicion that conception is present, but testing shows only one line, you should immediately contact a highly qualified specialist for help.
False positive result
This can happen if:
- the woman has impaired ovarian function;
- the test is carried out in the first two months after birth;
- the test used has expired;
- when a tumor occurs.
Test during menstruation
Some women's periods may not stop even after pregnancy. But you should know that menstrual blood does not affect the sensitivity of the test, so the result will still be true.
Even if the patient used material that contains bloody issues, if the required amount of hCG is present in it, the device will show two stripes.
Test for ectopic pregnancy
Fertilized egg in a condition such as ectopic pregnancy, is attached in most cases in the fallopian tube, and not in the uterine cavity as it should be. But hCG also begins to be produced. The only feature- small height hCG level or a complete lack of growth.
That is, if there is pathological pregnancy the test will show two lines. Most likely, the second one will be difficult to see, and it will be blurry and indistinct. And in this case, the test will be positive only after a delay in menstruation.
There is a test called INEXSCREEN. It makes it possible to determine proper pregnancy a couple of weeks after the delay.
Test for frozen pregnancy
If a woman has taken the test several times and it clearly shows a positive result, and then within a week the repeat test shows a barely noticeable second line or does not show it at all, then this most likely indicates that the pregnancy has stopped. You need to see a doctor as quickly as possible.
When to take the test?
Usually, the instructions for the texts do not contain information about when it is best to do testing. That is, if you are pregnant, the test will be positive at any time of the day.
Doctors recommend performing this procedure in the morning. In this case, the result will be true, especially in the early stages of gestation. If you do it in daytime, that is, the risk that a mistake will be made, since the urine, due to the liquid consumed throughout the day, will not be very concentrated.
A similar outcome will occur if the test is carried out in the evening - the concentration of hCG will be significantly lower. If there is a need to do the test during the day, it is recommended to refrain from urinating for four hours. It is important to limit the amount of liquid consumed.
