The third month of pregnancy belongs to the early stage of pregnancy, because the rate of spontaneous abortion in early pregnancy is as high as 10%, so in general, doctors do not recommend patients to have coitus in the early stage of pregnancy. In the early stages of pregnancy the embryo has just completed the process of implantation and is gradually developing into a fetus and fetal appendages such as the placenta. Early pregnancy is the most important stage of fetal development. During the development of the embryo, any harmful factors can cause the adverse outcome of pregnancy to occur. Pregnant women are advised to avoid the stimulation of adverse factors as much as possible in early pregnancy. Early pregnancy coitus, female sexual excitement may lead to uterine smooth muscle contraction, the embryo at this time not long after the bed, is not yet stable, the contraction may lead to the embryo bed more unstable, and even lead to the occurrence of miscarriage. In the early stages of pregnancy, coitus will also increase the incidence of cervicitis and vaginitis. Once cervicitis or vaginitis occurs, then under the stimulation of inflammation, it may also lead to abnormal fetal development and miscarriage. After the third month of pregnancy, the embryo is embedded in the chorionic villi to form the placenta, and at this time the stability of the fetus in the uterus has increased, so the possibility of miscarriage and premature birth due to coitus at this time is significantly reduced. However, if the placenta position is low, or even the placenta covers the cervical opening, or cervicitis vaginitis serious patients, after the third month of pregnancy is still recommended to reduce the frequency of coitus, coitus process pay attention to the action of gentle. However, if you have intercourse within the third trimester, you don’t need to worry too much, just pay attention to the symptoms of lower abdominal pain and vaginal bleeding and so on. If abdominal pain and vaginal bleeding occurs, you need to consult a doctor to rule out the possibility of early miscarriage, and if necessary, hospitalized to keep the baby. After the third month of pregnancy, if there are no special circumstances, you can have sex. Therefore, to summarize, it is possible to have sex after the third month of pregnancy without any special circumstances, but you still need to pay attention to the gentle movements of coitus.