1. What is a pregnancy test paper? A pregnancy test paper is a test paper that can detect whether the urine contains human chorionic villi (hCG). hCG is a hormone produced in the body only during pregnancy, so pregnancy tests can help women confirm whether they are pregnant. 2. Early pregnancy test paper can detect pregnancy in the earliest days. Normally, a woman’s menstrual cycle is about 28 days, and the ovulation period is about 14 days before the start of menstruation. If you haven\’t had your period within 10-14 days of ovulation, you may be pregnant. this