The dangers of having intercourse inside the first month of pregnancy can cause infection in the uterus, which can seriously lead to infection of the gestational sac leading to miscarriage, and in the early stages of pregnancy when the fetus is not stable, intercourse can cause the aura of miscarriage, so it is not recommended to have intercourse in the first month of pregnancy. It is recommended to have intercourse during pregnancy in the middle of pregnancy, that is, during the 4-6 months of pregnancy, when the fetus is stable and will not cause miscarriage or intrauterine infection. If there is abdominal pain and bleeding after intercourse, you should go to the hospital for ultrasound and blood test for HCG and progesterone, etc. If there is an aura of miscarriage, you should use progesterone reasonably to keep the fetus, and bed rest is recommended. In the first month of pregnancy, sexual intercourse is prohibited, it is recommended to eat more high-protein food, and it is also recommended to take reasonable folic acid supplements, and it is best to exercise properly to enhance body resistance, which can promote fetal development.