During the first trimester, it is best not to have intercourse. Pregnancy is a process in which the sperm and the egg are united and implanted in the uterine cavity. During the first trimester, the embryo has just settled in the uterine cavity and its implantation is not yet stable. Intercourse during this period may affect the implantation of the embryo due to mechanical impact, or may cause the embryo to shift its position if its implantation is not yet stable, thus causing miscarriage. In the fourth to sixth month of pregnancy, that is, the middle of pregnancy, the embryo has been more stable, at this time, if there is no pathological conditions such as low placental state, you can have intercourse appropriately. The only thing is that you should be careful not to move too vigorously during intercourse and not to press the pregnant woman’s stomach. In early pregnancy, besides paying more attention to life, you should also pay attention to taking oral folic acid every day to prevent fetal neural tube malformation. Pay attention to rest, don’t stay up late, and have regular maternity checkups to understand the growth and development of the fetus.