How many days of pregnancy can a pregnancy test stick detect?

If a woman has not had her period 7 to 10 days after having sex, she can take an early pregnancy test. The pregnancy test stick can accurately check whether a woman is pregnant. Of course, it is not 100% accurate, but its accuracy is relatively high. The further along you are in your pregnancy, the more accurate the pregnancy test will be. To increase accuracy, it is best to wait until 11 days after sexual intercourse.

How many days of pregnancy can a pregnancy test stick detect?

Under normal circumstances, women can start using pregnancy test sticks about 7 to 10 days after having sex, but the accuracy of the test at this time is not very high. Pregnancy is determined by testing the HCG concentration in the blood or urine, and the change in these concentrations requires a process. Generally speaking, it can be tested 7 days after fertilization, but the accuracy at this time is relatively low. If you want a high accuracy rate, wait until 11 days, when it will be more accurate.

How pregnancy tests work

It is to test the HCG value, that is, the value of human chorionic gonadotropin, which is produced by the placenta. Generally, this hormone will be excreted into the urine through the pregnant woman's blood circulation a few days after the woman is pregnant. Therefore, the morning urine extraction test has the most accurate result, and this method is relatively convenient. If the pregnancy has not been detected in the first few days, it may be because the secretion of this hormone is low. You need to wait a few more days, around the 10th day of pregnancy, then it will be easy to detect.

When testing with a pregnancy test stick, the pregnancy result can be read after 1 minute, that is, two lines are clearly displayed, which is the result of pregnancy. In addition, due to the low HCG hormone content in the urine in the early pregnancy, it may take up to 3 minutes to show the second line to determine whether you are pregnant. The result of not being pregnant must be determined after 3 minutes. If there is still only one control line after 3 minutes, it means you are not pregnant. Results read after 5 minutes will be considered invalid.

From the description in this article, we can know that generally speaking, a pregnancy test can be used to detect the result seven days after a woman becomes pregnant. Of course, there are certain differences among different women. The seven days mentioned here refer to the earliest pregnancy that can be detected.