Which pregnancy tests lie most often? Pregnancy test - why it lies and when are the most correct results?

From the moment the egg attaches to the uterus, the woman’s body receives information and begins preparing for it. The work of many organs is restructured under the influence of hormones, which begin to be produced more actively. The level is constantly growing human chorionic gonadotropin human, or hCG - the hormone that determines pregnancy. The tests are based on assessing the amount of this particular substance in a woman’s urine - if its level exceeds the norm for a non-pregnant woman, then the test shows positive result, which indicates that the lady is most likely expecting a child.

Pregnancy tests are convenient because they can be carried out in the UK and do not require special equipment. They are reliable compared to other home methods of determination. Tests from different manufacturers have different sensitivity: while some cannot yet due to too early a period and a small amount of the hormone, others already show distinct red stripes.

Most tests guarantee an almost accurate result from the first day of the delay, but you need to understand that the hormone accumulates gradually, and its concentration in the urine is much lower than in the blood, therefore, the more time passes from the moment of conception, the more accurate the result will be. Doctors recommend a test after ten days for accuracy.

A pregnancy test should be done in the morning, when the concentration of various substances in the urine is increased.

When is a false pregnancy test result possible?

When buying a test, check its expiration date - if it has expired, you cannot hope for an accurate result. The test may work if you do not follow the instructions. Read all package directions carefully and follow them carefully. For reliability, use two or three tests from different companies.

Pregnancy tests may show false-positive and false-positive negative result s, and the second cases are much more common. A negative result is an indication that there is still insufficient urine hCG level so that the test can detect it. This happens if it occurs a few days before the expected start of menstruation.

If you drink a lot of water before the test, the concentration of the hormone in the urine will decrease, and the test may also show a negative result.

A positive result occurs very rarely and is associated either with low-quality products or with health problems when taking certain medications that cause increased level HCG in the body. This could also be a sign ectopic pregnancy and threats of miscarriage.

To determine pregnancy in the early stages at home, many women usually use a test that can be purchased at any pharmacy, and in general such tests rarely lie. Do you want to know how often pregnancy tests lie?

How do you know if pregnancy tests are lying?

Early diagnosis pregnancy helps to avoid many problems in the future during pregnancy healthy child. The first signal that you are pregnant is, of course, the absence menstrual cycle. Symptoms of pregnancy can also be increased appetite, excessive drowsiness, nausea, vomiting, dizziness. However, sometimes these symptoms are not enough for a woman to establish pregnancy, or they do not fully manifest themselves, and then she decides to use a test to determine pregnancy.

When does a pregnancy test lie?

It's worth remembering that home test sometimes he lies and will not always be able to show the correct result. Both false positive and false negative result possible under the following conditions:

• Kidney diseases;
• Reception hormonal drugs which contain the hCG hormone;
• Use large quantity a fluid that washes the hormone out of the urine;
• Ovarian cyst, gynecological tumors;
• Risk of miscarriage;
• Ectopic pregnancy;
• Test sensitivity level. To detect pregnancy already on day 7, a test with a sensitivity of 10 Mme/ml is recommended;
• Implantation of a fertilized egg into the uterus can occur on the 10th day after fertilization, so the concentration of hCG is insufficient to determine pregnancy;
• The expiration and storage dates of the pregnancy test have been violated;
• The packaging of the pregnancy test has been damaged and moisture has gotten inside;
• Failure to follow instructions for using a pregnancy test.

For a reliable result, you need to contact a gynecologist who will prescribe a test to determine the level of the hormone in the woman’s blood. This test does not lie, as it is carried out in a clinical setting and helps determine the dynamics of hormone growth, show an ectopic pregnancy, and prevent miscarriage or fetal death.

Can I take a pregnancy test during menstruation?

Undoubtedly, if a woman notices all the symptoms of pregnancy. Typically, ovulation in many women and girls occurs on the 13-14th day of the menstrual cycle. When fertilization occurs in this cycle, the egg reaches the uterus only on days 7-15. If implantation occurs later than usual, your period may begin. There are cases when, in one cycle, two eggs mature in different ovaries, and if one is fertilized, the other is released along with the endometrium, forming menstruation. Positive test pregnancy during menstruation is possible and if there is hormonal disorder, ectopic pregnancy or threatened miscarriage. In any case, even if a woman does not think that the pregnancy test is lying, she should consult a doctor.

How does the test determine pregnancy?

A pregnancy test is an indicator hCG hormone(human chorionic gonadotropin). This hormone secretes ovum after the fertilized egg has passed through the fallopian tubes and implanted into the uterine cavity. This usually occurs on the 6th day of pregnancy, while the hormone in the urine increases every two to three days, and decreases only by the tenth week of pregnancy.

What do the lines on a pregnancy test mean?

The pregnancy test contains a special indicator that is capable of binding hCG, while changing its color if the concentration of the hormone exceeds the sensitivity threshold of the indicator. The first strip of the test shows that it is suitable for consumption, and the second indicates the presence or absence of pregnancy. Even a faint color of the second stripe indicates pregnancy, since the presence of the hormone changes over time in a woman’s body. If you follow all the rules for using the test, it has a 98% guarantee.

A pregnancy test will help identify a woman’s interesting position in the early stages and signal changes in her body. But only a gynecologist in a hospital can make the most accurate diagnosis, so after discovering the coveted two stripes, you should not delay your visit to the doctor.

Time: 12:09 Date of: 18/04/02

Help me to understand! I am 1.5 weeks late (this has never happened before) and there are no signs of an approaching period either. I took three different rapid tests to determine pregnancy, but the result was zero (that is, the tests show that there is no pregnancy. Is it possible that the tests are showing incorrectly?

Time: 13:06 Date of: 18/04/02

It's very possible. I didn’t show anything until the 6th week, I already went to the gynecologist and she manually felt everything there, that there was a pregnancy, but he still gave a negative result.

Time: 13:16 Date of: 18/04/02

obychno HOROSHIE pesty ne vrut. u menja opredelili na sroke kogda betta byla 29(nu ochen" malen"kaja)

Time: 13:19 Date of: 18/04/02

They're still lying. It is usually believed that they lie in the direction of not showing pregnancy if it is present, but here on an old forum one girl wrote that her husband’s pregnancy test was positive.
In order not to suffer and not to guess whether the test is lying or not, it is better to take a BLOOD test for hCG. The most accurate thing that can be.

Time: 16:25 Date of: 18/04/02

As a doctor once explained to me, the test can be negative in the presence of pregnancy if the deadline for determining it is missed. Simply put, on the first day of the delay the test would be positive (if there is a pregnancy), and after a few days the test will persistently show 1 line.

I don’t know how true this is, because... I always went to the doctor to calm myself down, which I advise you to do.

Time: 17:37 Date of: 18/04/02

It may well be, although for me personally the pregnancy was discovered precisely by a test. On the other hand, my pregnancy period was then 10 weeks, no less, but my doctor definitely confirmed the pregnancy.

Time: 08:11 Date of: 19/04/02

Tests can lie (in the direction of denying pregnancy).

Time: 09:16 Date of: 21/04/02

Fertilization of the egg by the sperm occurs in the fallopian tube, after 14 days (for each woman individually, it can take a month) the fetus enters the uterus, after which a hormone begins to be produced, to which the 2nd strip in the test reacts, and only then can we say, that the woman is pregnant, although all this time she was already in an “interesting” position. If the tests do not show pregnancy, then you should not postpone the visit to the gynecologist for a long time. But delays can also be caused by stress and changing belts. How is your general condition? I knew that I was pregnant within a week without any tests, so much and in such quantities, I never wanted condensed milk.

Time: 21:50 Date of: 22/04/02

They can, they can lie! And how

Time: 11:51 Date of: 23/04/02

And I have tests for 3 months. showed pregnancy, ultrasound showed its absence. As a result, it turned out to be a bad disease. Sorry, I'm not scaring, I'm just sharing my experience.
They didn't lie for 4 years. If there are any violations, the 2nd stripe may actually blink.

Time: 13:58 Date of: 23/04/02

Go to the doctor. They will do a blood test or look at an ultrasound and they will determine everything: whether you are pregnant or not. Because if there is no pregnancy, a cycle failure for such a long period of time is not very good sign. I wouldn’t have been able to stand so much time in uncertainty; I would have run away long ago.

Time: 13:40 Date of: 27/04/02

And I have a funny thing about this - quite often I donate blood to the Central Clinical Hospital laboratory, where they check it for everything and they always tell me that I’m pregnant) Although special. They don’t do a test, but speak based on some of their characteristics.

Time: 15:44 Date of: 28/04/02

I have a lot of experience with express tests; I’ve been doing them for five years.
They have never let me down. With long delays, I did it 100 times, it always showed no pregnancy. And when I became pregnant, I found out about it precisely from an express test.
In my opinion, the main thing is to do it right:
- preferably use morning urine,
-evaluate the result in 1-5 minutes, and not 10-20, because after 10-20 minutes the second strip usually always appears,

- and remember that even the faintest second line (maybe barely visible) means that you are pregnant

Time: 09:09 Date of: 08/05/02

By the way, when I was in the hospital, doctors, if they urgently needed to determine pregnancy, also used them. Very rarely. U healthy women with normal hormone levels good tests

Time: 22:26 Date of: 10/05/02

They practically don’t lie. You can take a blood test for hCG, do an ultrasound - this is to make sure.

Time: 14:06 Date of: 20/05/02

Since the moment of pregnancy, I took the test 6 times within a month (“Be sure”) and it never showed pregnancy. This only became clear when I went to the doctor. And somewhere in the second month, the test showed a weak second line. Like this.

Time: 04:05 Date of: 29/05/02

By the way, I took a test yesterday and it was negative. I’m 6 days late, and last month I didn’t have my period at all, but I went to the doctor and said that there is no pregnancy. But I also didn’t find any illnesses related to the lack of periods, she says the cycle needs to be stabilized and she prescribed hormones, but I don’t take them . This time, while I’m waiting, I don’t know the signs of pregnancy, so I don’t see them, but there seem to be no signs of menstruation. So. I don’t know what to do..maybe already)))I hope....

Time: 21:56 Date of: 04/06/02

Three in a row is unlikely. Maybe I should wait for an ultrasound?

If all your knowledge about pregnancy tests is limited to stories about “two lines”, then this article is what you need..

Pregnancy tests look for a substance called human chorionic gonadotropin (hCG) in the blood or urine. This hormone begins to be produced at the very moment when the fertilized egg attaches to the wall of the uterus.

This usually - although not always - occurs six days after conception. If pregnancy occurs, the level of hCG begins to rise extremely rapidly, doubling every two to three days.

What pregnancy tests are there?

In general, they can be divided into two groups: blood and urine tests.

You can perform a urine test not only in a medical office, but also at home. These rapid tests are simple and convenient. To achieve maximum reliable results carefully follow all the rules described in the instructions.

Blood tests are carried out only in medical institutions. This method allows you to detect pregnancy at a very early stage, but for obvious reasons you need to wait longer for results than with a urine test.

Blood tests for hCG are of two types:

1) Qualitative test - establishes the presence or absence of hCG in the blood. In fact, it only gives an answer to the question “Are you pregnant?”

2) A quantitative test (beta-hCG) measures the exact amount of the hormone in the blood. The sensitivity of this test is extremely high. Knowing the exact concentration of this hormone makes it possible to monitor problems that arise during pregnancy. In addition, this test is absolutely necessary to diagnose an ectopic (tubal) pregnancy.

How accurate are pregnancy tests?

For reliable determination pregnancy must wait at least ten days after the delay. It is advisable to carry out the test in the morning, when the urine is most concentrated.

Home rapid pregnancy tests are approximately 97% accurate. The following factors may influence this indicator:

1) Carefully follow all instructions.

2) Timing of ovulation and implantation of the egg into the wall of the uterus.

3) Suitable choice deadline for the test.

4) Sensitivity of a particular test.

Price of the test and difficulties in using it

You can buy a pregnancy test at any pharmacy without a prescription. The price depends on the manufacturer. For the most part, they are inexpensive: the price range varies from 80 to 800 rubles, rarely more.

Using home tests is usually straightforward. The most convenient tests are those that can be held directly under a stream of urine, but there are other options: some strips are prescribed to be placed in a glass of urine, while others need to be dripped with a pipette.

Be that as it may, after contacting the urine with the strip, you need to wait a few minutes to get the result. The latter may appear as a stripe, a change in color, or through symbols (for example, “+” or “–”). They also sell advanced digital tests that will delight you with the word “Pregnant” on the display.

How to interpret test results

It is important to know what positive and negative pregnancy test results mean.

If the result positive, that means you are pregnant. And it doesn’t matter how faded the stripe, symbol or sign is. IN in rare cases There are so-called conditionally positive results: when, according to the test results, pregnancy has occurred, which in fact is not true. Such errors may be associated with the presence of protein or blood in the urine, as well as with the use of certain drugs (tranquilizers, anti-convulsants and others).

Negative the result means that you are most likely not pregnant. However, the opposite is also possible if:

1) the test strips have expired,

2) you violated the operating rules,

3) you tested too much early,

4) your urine is too dilute because you drank a lot of water the day before,

5) you are taking certain medications (for example, diuretics and antihistamines).

If you get a negative result, just in case, repeat the test in a week to be sure.

If you get different results after taking multiple tests, contact your doctor. It may be time to do a blood test for hCG.

Can a pregnancy test lie?

Unfortunately, pregnancy tests can be deceiving. And this depends both on the quality of the test and on the timing of pregnancy. If the period is very early, then the hormone chorionic gonadotropin, which is secreted by the placenta, is not yet in the blood. Accordingly, this hormone enters the urine from the blood, and the test already produces two stripes. Typically, the test can detect pregnancy approximately 16-18 days after conception.

How could it? Tests have lied several times in my life. But usually this was noticed during the BIShur tests, two stripes were shown for no reason, and when there was pregnancy, they were silent. But the Canadian tests Lady Check and Bonadea have never failed.

I don’t know whether they’re lying or not, but the first time we showed two lines, although there were no symptoms and I didn’t even imagine that I was pregnant. I just lay in the hospital and was injected with antibiotics for 10 days, twice a day, so I thought that there was a problem and my period was late, but they simply advised me to buy a test and check. I bought it just to laugh... so my husband and I laughed with joy, I was already 9 weeks pregnant. Our test failed on the first try.

Maybe. To clarify, you need to go for an examination to a gynecologist, do an ultrasound and donate blood for beta hCG (this is the most accurate method).

Maybe I had such a case. The test showed two lines, I went to the gynecologist right away, I even took the test. And the gynecologist upset me - false positive. This could be either due to misuse, or the test itself is not very good good quality.

I then started taking several tests at once if there were any suspicions.

It very well may! I had this happen more than once that I thought that the test was positive, I wanted to please my husband, but that was not the case when, one day after such a situation, I went to my gynecologist, showed the test, he looked at me and said that even there is no hint, I concluded that there are different manufacturers, just like with pills, there can also be fakes, and also, when I became pregnant, I did a test after an ultrasound and a trip to the women's, one of 2 tests, and from one boxes showed a negative result, so draw your own conclusions.

Maybe. everything has glitches and nothing is perfect

The test may lie if it doesn’t show two lines, but if it shows positive, then it’s 99.9 percent pregnant. He lied to me on the first and second days of the delay. Then I did it a week later and the pregnancy was confirmed.))

It may still be possible!

When I became pregnant, I bought five tests in one package. And on one day, or rather in the morning, all this happened, I used two at once. And the first one showed a positive result, I didn’t believe it, let’s check it a second time and it’s negative. I had to open the third one, but it was still a plus.

The test may show an erroneous result if: the testing conditions have been violated, or the line on the test may change over time.

But, if three tests show the same result, then do not doubt the veracity of the test. Better yet, try with your husband! Believe me, a month is not a long time!