Ultrasound can be done once a week in early pregnancy, but there is no need for frequent checkups if there is no abnormality. Ultrasound in early pregnancy is to find out whether the gestational sac is normally deposited in the uterine cavity, whether there is any development of embryonic buds and fetal heart, without abnormalities, ultrasound can be done at 6~8 weeks, and with abnormalities you can do ultrasound once a week interval. Ultrasound will not affect the growth and development of the embryo, but if it is not necessary, try not to check frequently, each ultrasound is also a stimulus to the uterus, and may also have a psychological impact on the pregnant woman. In early pregnancy, you should pay more attention to rest, observe your body for abnormal bleeding, abdominal pain and other symptoms, and seek medical treatment in time if there is any abnormality.