Pregnancy tests should be performed from the time early pregnancy is confirmed. It can usually be checked by early pregnancy test 15 days after intercourse or if your period is delayed for more than 7 days. After pregnancy is detected, blood chorionic gonadotropin and progesterone can be checked. The doubling of chorionic gonadotropin every other day in early pregnancy and the gradual increase of progesterone indicate a healthy embryo. At more than 40 days of menopause, you can check for intrauterine pregnancy by ultrasound. Within 12 weeks of early pregnancy, a maternal health handbook check is established to assess the basic physical condition of the pregnant woman and to screen for high-risk factors for management. within 28 weeks, check-ups are conducted once a month, every two weeks from 28 to 36 weeks, and once a week after 36 weeks. If abnormalities are found, the number of maternity checkups can be increased.