The time between pregnancy checkups is based on the week of pregnancy as well as the specific condition of the pregnant woman. Prenatal checkups during pregnancy are an important means of ensuring a safe pregnancy as well as maternal safety. The checkups can be used to understand the growth and development status of the fetus, screen for malformations, and understand the physical condition of the pregnant woman as well as her high-risk factors. The minimum number of checkups during pregnancy is not less than 8. The specific intervals are as follows: within 12 weeks of pregnancy, at least one checkup; between 12 and 28 weeks of pregnancy, one checkup every month; before 28-36 weeks of pregnancy, one checkup every two weeks; after 37 weeks of pregnancy, one checkup every week. Pregnant women with high risk factors, such as gestational hypertension, gestational diabetes mellitus, multiple pregnancies, abnormal fetal development, etc., need to increase the number of checkups and shorten the interval between checkups as appropriate. During pregnancy, it is important to follow the doctor’s requirements and conduct prenatal checkups on time, so as to prevent and detect complications at an early stage and minimize adverse effects.