How to identify false positive pregnancy test before menstruation

Pregnancy is a very important event for women and their families. Pregnancy means that there may be a new member coming to the family. When there are symptoms of pregnancy, we usually take various measures to verify whether it is accurate pregnancy. Using pregnancy test paper is a more common method. When a woman is menstruating, it may cause a false positive pregnancy test paper. So how to identify a false positive pregnancy test paper before menstruation?

How to identify a false positive before menstruation

Although early pregnancy test strips are a very convenient way to detect whether you are pregnant, they are not 100% accurate, especially before the menstrual period, when a false positive reaction may occur. Some people may also get a negative result if they are pregnant for a short period of time. Therefore, it is best to go to the hospital for a blood or urine HCG test.

Causes of false positive pregnancy test

Many people wonder why early pregnancy test strips may show false positives? To know the reason, we need to look at the principle of early pregnancy test strips.

1. After becoming pregnant, women will secrete human chorionic gonadotropin, which can be detected in urine.

2. There is almost no HCG in the urine of non-pregnant women. The early pregnancy test strip determines whether you are pregnant by detecting the value of human chorionic gonadotropin (HCG) in urine.

3. Under normal circumstances, there are two results of early pregnancy test: drop urine into the detection hole on the test paper. If a colored band appears in the control area of ​​the test paper (some test papers appear red, some test papers appear blue), it indicates negative, indicating that you are not pregnant. On the contrary, if a clear color band appears in the test area, it indicates a positive result, indicating that the pregnancy is already there.

4. This test has the advantages of being rapid, convenient, sensitive and highly specific. Early pregnancy test strips can only be used as a preliminary screening test. Do not rely on them too much, because false positives or false negatives may occur when using early pregnancy test strips.

5. Some people use early pregnancy test strips and find out that they are pregnant, but when they go to the hospital for a check-up, they find out that they are not pregnant. The early pregnancy test strip shows a false positive.

This situation may also be a false pregnancy. Physiologists believe that false pregnancy is a combined physiological and psychological "deficit". After getting married, some women, eager to have children, often compare themselves with their sisters who got married at the same time, and become envious and anxious when they see others getting pregnant. When you think about it day and night or dream about it, a strong "anticipation" excitation focus will form in the cerebral cortex, affecting the dysfunction of the hypothalamus and pituitary gland, and eventually leading to amenorrhea.

After menopause, under the influence of sex hormones in the body, fat will accumulate in the lower abdomen. Under the influence of the psychological factor of their desire to get pregnant, they believe that they are pregnant, and thus have corresponding "pregnancy" reactions such as anorexia, picky eating and vomiting.

Generally speaking, if women do their own pregnancy tests at home, without any outside guidance, the test results are generally only 51% to 76% accurate. A false positive pregnancy test may be caused by nervousness or other factors.