For women who do not use contraception, if they want to know if they are pregnant, they can usually find out if they are pregnant by checking their blood HCG as early as 8 days after the last intercourse, but some women may not be able to find out until 11 days after the intercourse. If a woman only wants to use pregnancy test paper to detect early pregnancy, the time to know whether she is pregnant may be delayed, and the diagnosis can be made about 16 days after intercourse. Because some women do not discharge their eggs during intercourse, the time for the fertilized egg to settle will be delayed accordingly, and the time to detect pregnancy will also be delayed. If a woman is counting according to the time of menopause, the time she knows she is pregnant is around 30 days after menopause. If the blood HCG is checked, it may be detected in 28-30 days after menopause. For early pregnancy tests, it may be around 35 days after menopause. The definitive diagnosis of early intrauterine pregnancy still needs to be determined by pelvic ultrasound.