How does the pregnancy test work?
The accuracy of pharmacy tests is approximately97%. They allow you to detect pregnancy from the first days of a missed period. But it happens that the result is incorrect - a false positive pregnancy test indicates that life is developing in the woman's body, but in fact this is not the case.False positive pregnancy is possible bycause of incorrect use of the test or when there are tumors in the body. Photo: Getty To understand why the results are wrong, you need to know the principle of the pregnancy test. All types of tests work on the same principle: they reveal the hCG hormone produced by the chorion (the future placenta). This hormone appears one day after the embryo is attached to the uterine wall. After several days the concentration of the hormone increases, and the test shows 2 strips or the corresponding inscription.
Causes of a false positive pregnancy test
The test may show an incorrect result for the following reasons:
- He was overdue or defective. It is necessary to look at the expiration date when buying the test. Recognize the marriage is more difficult, but you can repeat the pregnancy test several times.
- The test was applied too early - before the delay in menstruation.
- The instruction for its use was not followed. For example, a woman evaluated the result after the indicated 5-7 minutes after dropping the strip into the urine.
- The woman took hormonal medications that increase the amount of hCG.
- In the body there was a hormonal failure.
- The woman suffered an abortion, a miscarriage or an ectopic pregnancy.
- Presence of tumors and cysts. If a woman did not plan pregnancy, but the level of hCG is elevated, it is important to undergo a comprehensive examination to exclude oncology.
False positive results are less common,than false-negative. This is due to the fact that women are too early to conduct home testing to determine their interesting situation, without waiting for a delay. Perhaps a positive pregnancy is associated with incorrect use of the test or the appearance of tumors. Therefore, to confirm pregnancy, you should see a doctor, do an ultrasound and take tests.