How accurate is the pregnancy test paper?

Nowadays, many women use pregnancy test papers or test sticks to determine whether they are pregnant. However, many people will doubt the results of pregnancy test papers or test sticks. Of course, it is possible that they may be inaccurate occasionally. So, what is the accuracy of pregnancy test strips? Also, are the results of pregnancy test strips reliable or not? Let me answer these two questions for you.

The principle of pregnancy test paper: It uses the reaction between single and multiple hCG antibodies in the device and antigens in urine to determine whether a woman is pregnant. About 14 days after sexual intercourse, the pregnancy can be detected from the urine.

Time of use: It can be tested 7-10 days after sexual intercourse. Of course, the longer the time, the more accurate it is. The working principle of early pregnancy test paper pregnancy self-test is to detect HCG value, that is, the value of human chorionic gonadotropin. This hormone is produced by the placenta and usually appears in the urine a few days after pregnancy. However, due to the small amount, it is difficult to test it at the beginning and it becomes increasingly obvious after 10 to 14 days. (HCG values ​​can also be measured through blood tests, which are much more accurate). Although many types of early pregnancy test strips indicate that women can do a pregnancy self-test one day after missing their normal menstrual period, in fact, not all pregnant women release HCG hormones at the same rate and in the same amount. This varies from person to person. Gynecologists pointed out: "If you do a urine test too early, the negative reaction may be wrong." Therefore, it is best to do a pregnancy self-test two weeks after your period is late, so that the result will be more credible.

The accuracy varies depending on the brand of product, with an average accuracy of 90% (in addition, clearblue is very sensitive and can be tested as early as 4 days before the expected menstrual period (with an accuracy of 75%), and the accuracy on the day of the expected menstrual period is 99%). The advantages of using pregnancy test strips to test pregnancy by yourself are that it is fast, convenient, highly accurate, and private. However, there is always a loophole. When using this method to test pregnancy, you must consider factors such as the time of the pregnancy test, the concentration of urine, the accuracy of menstruation, etc. Therefore, it is best to cooperate with the doctor's examination for more accuracy.

We also know that nowadays all products have different manufacturers, and the same is true for pregnancy test papers. Therefore, the accuracy of pregnancy test papers will vary from different manufacturers. However, it is undeniable that the accuracy of pregnancy test papers is still quite high. However, the editor still recommends that female friends should confirm whether they are pregnant after medical examination to avoid mistakes.