There are the following precautions in the fourth month of pregnancy: First, constipation may occur, so you should eat more fresh fruits and vegetables and do proper exercise every day, if the constipation is serious, you can seek the help of a doctor, do not use drugs without permission. Second, the fourth month of pregnancy belongs to the middle of pregnancy, very prone to anemia, so you should eat more iron-containing food to prevent anemia . Third, pay attention to the fetal movement, this time many pregnant women have felt the fetal movement, but the magnitude of the movement is relatively small, so you should record the time of the fetal movement. Fourth, pay attention to sleep, ensure sufficient sleep, do not get cold, so as not to cause a cold. Fifth, this month is a critical period for fetal development, so attention should be paid to supplementing various nutrients to promote healthy fetal bone development. Six, you should reduce the intake of sugar, otherwise it may cause hyperglycemia as well as gestational diabetes, and even swelling and other phenomena.