1. What is a pregnancy test stick? A pregnancy test stick, also called a pregnancy test strip, is a medical device used to detect whether a woman is pregnant. It determines pregnancy by detecting human chorionic villi (HCG) in urine. Pregnancy test sticks are divided into ordinary type and digital type. The ordinary type can only display two results: positive or negative; while the digital type can display specific HCG values. 2. How long does it take for a pregnancy test stick to detect pregnancy? Generally speaking, a pregnancy test can be used about 7-10 days after pregnancy. However, it is recommended that women take the test after their menstrual period is delayed for 7 days, so that the results will be more accurate and reliable. if before