The items to be examined in maternity checkups are determined according to the gestational weeks of pregnancy. 1. Early pregnancy: the early stages of pregnancy need to monitor the HCG changes, to clarify the growth and development of the fetus, in the 50-60 days, through ultrasound to clarify the development of the fetal heart and fetal buds, and wait until the 12th week of pregnancy, you can choose the NT examination, the preliminary screening for malformations. 2. Mid-pregnancy: In the mid-pregnancy, there is no need to check too frequently, but some major checkups are still needed, such as Down’s syndrome screening in 16-20 weeks, OGTT in 24-26 weeks, and 4D ultrasound macroanomaly checkups in 22-26 weeks to further exclude whether there are any growth malformations in the fetus. 3. Late pregnancy: At the same time, it is also necessary to carry out fetal heart rate monitoring and ultrasound every 1-2 weeks, to be alert to the phenomenon of intrauterine hypoxia of the fetus. Because each pregnant woman’s situation during pregnancy is different, so the specific items of the maternity test should also be judged according to the actual situation.