Prenatal checkups are for the protection of pregnant women and fetuses, and play a vital role throughout pregnancy. It can be started from three stages: 1. Early pregnancy examination: blood pressure, height, weight, blood type, blood sugar, electrocardiogram, liver function, kidney function, obstetric ultrasonography, thyroid function, nt and so on. The first is to determine intrauterine pregnancy and embryonic development in early pregnancy; the second is to assess the overall physical condition of the pregnant woman. 2, mid-pregnancy examination: mid-pregnancy is mainly to observe fetal growth and development, as well as the pregnant woman’s body is normal, regular checks of routine blood, urine routine. In 15-20 weeks to do Down’s syndrome screening, 22-26 weeks to do four-dimensional ultrasound, timely exclusion of large fetal malformations and congenital genetic diseases of the initial screening, if necessary, do amniocentesis or non-invasive DNA. 3, late pregnancy checkups: close observation of pregnant women’s physical changes and fetal movement, the need to check the blood, urine, blood pressure, fetal heart monitoring, ultrasound and so on. 37 weeks after the weekly checkups, the emergence of anomalies The body will be examined once a week after 37 weeks, and any abnormalities will be handled in time. Timely and effective prenatal checkups can reduce the occurrence of deformed babies and lower the maternal mortality rate. At present, many programs are free of charge, and considerable attention is paid to maternal health care.