What can cause a pregnancy test to be inaccurate?

A pregnancy test stick is a device that determines whether a woman is pregnant by testing urine. Many women use pregnancy test sticks to check whether they are pregnant after having sex. Under normal circumstances, the results of pregnancy test sticks are relatively accurate, but sometimes abnormal results will appear on pregnancy test sticks. There are many reasons for the inaccuracy of pregnancy test sticks. The following introduces what may cause inaccurate pregnancy test sticks.

When is the pregnancy test inaccurate?

Generally, urine pregnancy test is 5 to 7 days after menstruation, and B-ultrasound pregnancy test is 10 to 15 days after menstruation. The pregnancy test paper is not accurate on the second day of sexual intercourse, and the result of the pregnancy test paper is accurate only after 20 days after sexual intercourse.

What are the reasons why pregnancy test sticks are inaccurate?

1. False pregnancy causes pregnancy test errors. False pregnancy means that there are symptoms similar to those during pregnancy, such as nausea, vomiting, cessation of menstruation, abdominal distension, and similar fetal movements, which lead to errors in pregnancy tests.

2. Improper selection of detection time. When using a pregnancy test stick or test paper to test for pregnancy, it is best to test 14 days after having sex, as the chance of an error in the test is lower at this time. Moreover, when testing, it is best to choose morning urine, and the test results will be more accurate and reliable.

3. Drinking too much water before the test. You cannot drink too much water before the test, otherwise the urine will be diluted, which will affect the test results.

4. There is a problem with the detection method. Improper testing methods will directly lead to errors in pregnancy tests. For specific methods, please read the instructions in detail.

5. The influence of disease or medicine. If you suffer from certain diseases such as hydatidiform mole, bronchial cancer, etc., it will affect the pregnancy test results. Moreover, if you take certain medications for a long time, it may also cause errors in the test results.

6. The pregnancy test product is expired and deteriorated. Expired and spoiled pregnancy test products will cause errors in the pregnancy test, so pay attention to the shelf life when purchasing. In addition, do not keep it at home for too long after purchase, and avoid moisture, otherwise mistakes may easily occur when using it.