In the third trimester of pregnancy, if there are no other abnormalities in the body, you can have sex appropriately. After the third month of pregnancy, indicating that the mid-pregnancy, at this time the embryo is more stable, if the body does not have other abnormalities, you can have sex, but you should control the frequency of sex, and to avoid abdominal compression during sex, and do not use too much force, to avoid adverse effects. After seven months of pregnancy, usually in the late stages of pregnancy, sex is not recommended, because at this time the fetus is larger, sex may cause stimulation of the uterus, so that the uterus frequent contractions, easy to induce premature labor. Therefore, during pregnancy, we must understand the time period of sexual life, not blindly sexual life. In addition, pregnant women should pay attention to a balanced diet, coarse and fine grains, meat and vegetables with reasonable. Keep the vulva clean and hygienic, regular work and rest, keep a happy mood, regular maternity checkups.