The first three months and the second three months of pregnancy can not have intercourse, in the first three months and the second three months can have sex, that is, after the third month of pregnancy can have intercourse, but should pay attention to coitus action must be gentle, to avoid stimulation and cause uterine contraction, and the formation of preterm miscarriage or the possibility of preterm delivery. In addition, in the coitus should also pay attention to, can not have sex too often, if too often will lead to frequent uterine contractions, may cause the fetus in the uterus frequent hypoxia, resulting in fetal development retardation, so in the clinic should pay special attention to, and also recommended that in the sexual life must pay attention to sexual hygiene, before and after sexual life should be cleaned genitals, to reduce the inflammation of the production.