Intercourse is generally not recommended in the first month of pregnancy. In the early stages of pregnancy, women are affected by endocrine reactions to early pregnancy, and taking into account the safety of the fetus in the womb, the requirements and frequency of intercourse should be reduced. In addition, the uterus is sensitive at this time, the placenta is not yet mature, the placenta is not closely connected to the uterine wall, and the progesterone secretion to prevent miscarriage is insufficient to give strong protection to the fetus, so intercourse may lead to pre-eclampsia or even miscarriage, so intercourse is generally not recommended. In addition, for pregnant women who have been treated for preterm labor in the past, or who have experienced shortened or dilated cervix, amniotic fluid flow, placenta praevia, vaginal bleeding, or a history of miscarriage during pregnancy, intercourse should be prohibited in the first month. This is because intercourse may lead to pelvic congestion and uterine contraction, which may induce miscarriage. In addition, coitus is also not recommended during the late pregnancy. Because the uterus is growing too fast and the amniotic sac is falling, intercourse may cause premature rupture of the fetal membranes, which may lead to infection, umbilical cord prolapse, premature birth, fetal distress and other risks. The reason is that the placenta has formed and the fetus is more stable, so proper intercourse will not cause serious effects. But be sure to pay attention to gentle movements, and at the same time pay attention to rest, strengthen nutrition, avoid strain.