You should not have sex during early and late pregnancy because early pregnancy is the most unstable period for the fetus and is an important period for fetal growth and development, when care needs to be taken to preserve the fetus. If you have sex it can easily lead to uterine spasms, convulsions and contractions, which can increase the chances of miscarriage. The fetus grows more significantly in late pregnancy, the uterus increases, and the pregnant woman’s abdomen bulges, which can press on the uterus during sex and cause uterine contractions, which can increase the chances of preterm delivery. The fetus is relatively stable in the middle of pregnancy, when you can have sex, but you should also pay attention not to move too roughly. The number of sexual intercourse should be controlled to avoid miscarriage.