The number of maternity checkups should be about 9-11 times during pregnancy if the checkups go smoothly, as follows: 1. The first pregnancy checkup is about 6-8 weeks after pregnancy, with ultrasound to determine whether the pregnancy is intrauterine and to exclude ectopic pregnancy, while blood and urine routine and nail function tests can be done; 2. The second checkup is about 12-14 weeks, with ultrasound and NT checkups, once every 4 weeks until pregnancy. During this period, we need to do Down’s syndrome screening, diabetes screening, 4D, system, fetal heart ultrasound and other teratological examinations; 3, after the pregnant woman enters the late pregnancy period, that is, 28-36 weeks, we need to conduct a biweekly maternity check to observe the development of the fetus, at this time, we need to perform fetal heart monitoring and umbilical blood flow examination; 4, during the 36-40 weeks, we need to conduct a weekly maternity check, if the expected date of delivery has passed, we suggest to conduct two maternity checks a week. It is recommended to have two check-ups a week. It is more convenient to wear loose clothes and shoes that are easy to put on and take off. If you need to check liver function, you need to pay attention to fasting.