Can not do during pregnancy, including smoking, drinking, can not take drugs that have an impact on the fetus as well as part of the time during pregnancy can not have sex, diet also need to pay attention to a lot of, if there is discomfort need to consult a doctor in time. 1. Can not smoke: pregnant women are prohibited from smoking, and do not long-term exposure to second-hand smoke environment, smoke contains nicotine, pregnant women and the fetus will cause great harm. 2. Do not drink alcohol: alcohol can also enter the fetus through the placenta, resulting in intrauterine dysplasia, central nervous system developmental abnormalities. 3. Take medication with caution: medication during pregnancy should be taken under the guidance of a physician, such as drugs containing ephedrine, streptomycin, barbiturates and other drugs should be prohibited or used with caution. 4. Prohibit sexual intercourse during part of the period: Sexual intercourse is not allowed during the first and second trimesters of pregnancy, which may lead to miscarriage or preterm labor. 5. Dietary precautions during pregnancy: ice cream, watermelon and other cold foods should be consumed sparingly during pregnancy to avoid irritating the gastrointestinal tract and triggering abdominal pain, diarrhea and so on. It is not recommended to eat a lot of high sugar foods, such as cinnamon, honey, cake, etc., so as not to cause elevated blood sugar and affect the normal development of the fetus.