The precautions for early pregnancy mainly include avoiding strenuous exercise, not having sex, avoiding blind medication, and not contacting toxic and harmful substances. 1. Avoid strenuous exercise: during early pregnancy, pregnant women should avoid strenuous exercise. Because if early strenuous exercise, it may lead to an increase in abdominal pressure, which may lead to preeclampsia or miscarriage. 2. Prohibit sex: early pregnancy within three months can not have sex, because women in sex when the uterus will contract, and at this time the fetus is not very stable, once the uterus contraction, may lead to spontaneous abortion. 3. Avoid blindly using drugs: avoid contact with toxic and harmful substances. Early pregnancy within three months is the key moment of fetal organ growth and development, if blindly use drugs, or exposure to toxic and harmful substances, may lead to spontaneous abortion, fetal development deformity.