During this period, the fertilized egg has just been transferred to the uterine cavity and it is easy for the uterus to contract irregularly after intercourse, making the embryo unstable and causing the embryo to migrate downward and cause a pre-miscarriage or inevitable miscarriage. It is forbidden to have intercourse during the first 3 months of pregnancy and also during the last 3 months of pregnancy. In the middle of pregnancy, you can have a moderate amount of intercourse, which should not be too rough and should not last too long to prevent pressure on the uterus, which may affect the growth and development of the fetus and cause preterm miscarriage and preterm labor. After the pregnancy is confirmed, women should pay attention to proper rest to avoid the impact on the abdomen and affect the growth and development of the fetus.