Early pregnancy is generally not recommended to cohabitate, so as not to cause women to have preeclampsia and other uncomfortable symptoms. Early pregnancy, due to the embryonic development is not yet in a stable state, if coitus is carried out in early pregnancy, the possibility of inducing preeclampsia can not be completely ruled out. The process of coitus will cause some irritation to the uterus, so that the uterine smooth muscle contraction of varying degrees, serious cases of abdominal pain, vaginal bleeding and other symptoms, so it is not recommended to have coitus in early pregnancy. In addition, coitus is not recommended in early pregnancy or in the second trimester of pregnancy. The reason for avoiding coitus in late pregnancy is so as not to cause preterm labor, but the development of the fetus in mid-pregnancy is basically stable and there are no other abnormalities, you can have coitus appropriately, but the time should not be too long. If the other side of the presence of infectious diseases of the urinary system, such as urethritis, etc., also should not be carried out during pregnancy coitus. Early pregnancy women, to avoid all kinds of strenuous exercise, after the emergence of uncomfortable symptoms, need to go to the hospital in a timely manner, follow the doctor’s instructions for treatment.