The first trimester of pregnancy is an early stage of pregnancy and requires a lot of attention, the main ones being the supplementation of folic acid to prevent malformation of the fetus, avoiding miscarriage, paying attention to personal hygiene to avoid infections, and eating a well-balanced diet. The first trimester of pregnancy is an early stage of pregnancy, avoid taking medicines that are prone to malformations, and also take folic acid supplements to prevent fetal malformations. In addition, we should also pay attention to rest, not too tired, not coitus, so as not to cause miscarriage. Also pay attention to personal hygiene, such as changing underwear, bathing and so on, in order to avoid infection. Because the first three months of pregnancy is prone to early pregnancy reaction, so pay attention to light diet, balanced nutrition. It is recommended that pregnant women supplement folic acid in the first and second trimesters of pregnancy to prevent fetal malformations, and check the development of the fetus after menopause, and go to the hospital in time if there is vaginal bleeding and abdominal pain and other discomforts.