How soon can a pregnancy test strip detect pregnancy?

Pregnancy test strips (early pregnancy tests) can generally detect pregnancy accurately around 35 days after the cessation of menstruation, although the exact timing may vary due to individual differences among women. Starting from the first day of the last menstrual period—the standard point for calculating gestational age—pregnancy can typically be preliminarily detected using an early pregnancy test strip between the 33rd and 35th day. This result depends on the level of human chorionic gonadotropin (hCG) in the woman's body. In some women, because hCG levels rise more slowly, it may take until around day 37 before pregnancy is detectable by test strip. To ensure testing accuracy, women may choose to perform the test two weeks after a missed period and carefully read the instructions before using the test strip, following the correct procedure. Although these test strips are highly accurate, they are not 100% reliable. If there is any doubt, it is recommended to visit a hospital for further testing.