How long can pregnancy test paper detect pregnancy?

Pregnancy tests can detect pregnancy after 10-14 days.

First, a substance called human chorionic gonadotropin (HCG) is gradually produced in a woman's body after pregnancy. Pregnancy tests determine pregnancy by detecting HCG levels in urine. Generally speaking, HCG begins to be secreted after implantation, that is, about 6-7 days after pregnancy, but the amount is still small and may not be accurately detected. HCG levels increase over time and usually reach the threshold detected by pregnancy tests around 10-14 days of pregnancy.

Note that different brands and types of pregnancy tests may vary in sensitivity. Some sensitive tests may detect lower levels of HCG earlier, but there is no guarantee that accurate results will be obtained very early in pregnancy. In addition, the time and method of testing will also affect the accuracy of the test results. It is recommended to use morning urine for testing, because the HCG concentration in morning urine is relatively high, which is more conducive to testing. At the same time, it is necessary to strictly follow the instructions for use of the test paper to ensure the accuracy of the operation.

Finally, if pregnancy is detected using pregnancy test paper, in order to further confirm and understand the pregnancy situation, it is recommended to seek medical advice in time, such as blood HCG testing and ultrasound examination, to obtain more accurate and detailed information. If the initial test result is negative, but still suspected of pregnancy, you can test again a few days later.