Early pregnancy test can not be detected

If a woman is still not sure whether she is pregnant, she can go to the pharmacy to buy a pregnancy test stick or pregnancy test paper, because these two methods can also test whether she is pregnant. The pregnancy test paper is also a detection method with a very high success rate. As long as you master the correct method when using the pregnancy test paper, it can generally effectively detect whether you are pregnant. But why can't some women who are pregnant early detect pregnancy test paper?

Will the test paper fail to detect pregnancy?

In fact, although early pregnancy test strips are said to have a 99% accuracy rate, you must not overly trust your self-test results. According to expert statistics, the correct testing rate of early pregnancy test strips varies greatly, ranging from 50% to 98%. Many women are accustomed to using early pregnancy test strips to test whether they are pregnant, and hospitals also commonly use this method to test.

Why is there such a big difference? When women do self-pregnancy tests at home without any external guidance, the test results are generally only 50% to 75% accurate. If this test is done in a laboratory in the presence of a doctor who can ensure that the test strips are working properly and the woman can use the test strips correctly according to the instructions, the test accuracy may be close to 100%.

How long does it take for an early pregnancy test to detect pregnancy?

The working principle of self-testing pregnancy using early pregnancy test strips is to detect the 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). Neither too early nor too late will have good results.

It is generally recommended to use the first urine test in the morning for women who have just become pregnant, as the results are more accurate. But for women who have been pregnant for some time, urine from any time of the day can be used for testing.

It usually takes about 7 days from intercourse to pregnancy, which means that pregnancy can be tested on the day of pregnancy (equivalent to 7 days after intercourse).

Usually the results of early pregnancy test strips are more accurate, but inaccurate tests may occur due to improper use. Therefore, if a woman is preparing for pregnancy and has not taken any contraceptive measures, and her menstruation stops, if the early pregnancy test cannot confirm the pregnancy, she must go to the hospital for pregnancy-related examinations.