Why does the early pregnancy test paper appear false positive? What is the reason for false positive of early pregnancy test paper?

Many female friends will use early pregnancy test paper to test whether they are pregnant when they are worried about their unexpected pregnancy, but when using early pregnancy test paper, there are usually many wrong results. For example, a female friend used a test paper for early pregnancy and found that the test paper was false positive, which has always been the case. What's going on here?

1, the reason of false positive test paper

Early pregnancy false test paper can only be used as a preliminary screening test, so we must not believe it too much, because false positive or false negative will appear when using early pregnancy test paper. The following small series will tell you about the reasons for the false positive of early pregnancy test paper. Come in and have a look if you want to know.

Human chorionic gonadotropin (HCG) will be secreted from placenta after pregnancy and detected in urine. There is almost no HCG in the urine of non-pregnant women. Early pregnancy test paper is to determine whether you are pregnant or not by detecting the value of human chorionic gonadotropin (HCG) in urine.

Under normal circumstances, there are two kinds of test results of early pregnancy test paper: drop urine into the test hole on the test paper, and if a ribbon appears in the control area of the test paper (some test papers are red and some test papers are blue), it means negative, indicating that there is no pregnancy; On the other hand, if there is obvious color band in the detection area, it means positive and pregnancy. The detection method has the advantages of rapidity, simplicity, sensitivity and high specificity. Early pregnancy false test paper can only be used as a preliminary screening test, so we must not believe it too much, because false positive or false negative will appear when using early pregnancy test paper.

This situation may also be a false pregnancy phenomenon. Physiologists believe that fake pregnancy is a comprehensive "deficit" of physiology and psychology. Some women are eager for their children after marriage, and often compare with their sisters who are married at the same time. They watch others get pregnant and envy anxiety. When yearning or dreaming, the cerebral cortex forms a strong "Pan Zi" excitation focus, which affects the dysfunction of hypothalamus and pituitary gland and eventually leads to menopause.

After menopause, under the influence of sex hormones in the body, the fat in the small abdomen will also accumulate. Under the psychological factors of expecting pregnancy, they think they are pregnant, so they have corresponding "pregnancy" reactions such as anorexia, picky eaters and vomiting. Some women, under the psychological effect of "simulated pregnancy", will have a imbalance between estrogen and androgen in the body, and even butterfly spots appear on the pink face of peach cheeks, and there is a feeling of "fetal movement" in the stomach, which is purely psychological.

2. The accuracy of the test paper is high.

Generally speaking, if a woman does a pregnancy self-test at home, the accuracy of the test results can only reach 5 1% to 76% without any external guidance. The false positive of early pregnancy test paper is probably due to nervousness or other factors. If the test is conducted in front of the doctor in the laboratory, the doctor can ensure that the test paper works normally, and women can use the test paper correctly in strict accordance with the instructions, and the test accuracy may be close to 99.9%.

Relevant obstetricians and gynecologists reminded that the use of early pregnancy test paper must be accurate. Before going to the toilet, read the instructions of the test card carefully and follow the instructions of the early pregnancy test paper carefully. Otherwise, it is easy to have false positives, leading to inaccurate results.

Although the early pregnancy test paper has given some help to women, be careful not to blindly believe that it will give you the final answer. Inappropriate testing time and method may lead to inaccurate results. The result of early pregnancy test paper is not 100% accurate. To accurately know whether you are pregnant, you should go to a professional hospital for HCG urine test or blood test to accurately judge whether you are pregnant.

3. Two lines of results are not allowed.

The two lines detected by pregnancy test stick are not 100% accurate. For example, the pregnancy test stick is deep and shallow, which does not mean that you are really pregnant. Even if two obvious bars are displayed, sometimes you may not really be pregnant. Therefore, it is better for women to go to the hospital for testing to confirm whether they are really pregnant.