Pregnant women in the first trimester of pregnancy should take folic acid, pay attention to nutritional supplements, take proper rest, and observe body changes. 1. Take folic acid: the first trimester is the early stage of pregnancy, pregnant women can take folic acid tablets, can prevent fetal neural tube malformation role, more favorable to the development of the fetus. 2. Pay attention to nutritional supplements: pregnant women in the first trimester should pay attention to nutritional supplements, eat foods rich in protein, minerals and vitamins, such as milk, eggs, beef, fish, apples, dragon fruit, spinach, etc., which is conducive to the growth and development of the fetus. 3. Appropriate rest: the first three months is an important period of embryonic differentiation and formation, during which we should pay more attention to rest, and appropriate walking activities without abnormalities, which is conducive to the growth and development of the fetus. 4. Observe the changes in the body: the first trimester of the gestational sac in the uterus bed is not stable, the process of pregnancy will have the possibility of miscarriage, pay more attention to observing the changes in the body, there are abnormalities in vaginal bleeding, abdominal pain and other symptoms should be timely medical attention. After pregnancy to do a good job of maternity testing, there are abnormalities can be timely treatment.