The prenatal examination includes a detailed medical history, physical examination, obstetric examination and necessary auxiliary examinations. 1. Medical history: the mother’s age, occupation, pregnancy history, checking the expected date of delivery, menstrual history, family history, previous pregnancy history, and the whole process of this pregnancy. 2. Physical examination: observe the nutritional, neurological and developmental conditions of the pregnant woman, as well as her height, weight, blood pressure and pulse. 3. Obstetric examination: abdominal examination is usually visualization, palpation and auscultation, pelvic measurement including inside and outside of the pelvis, vaginal examination, etc., as well as choosing different auxiliary examinations for different trimesters. Prenatal examination is an important measure to reduce the incidence of maternal and perinatal complications and mortality, for the sake of maternal and fetal health should go to the hospital regularly according to different gestational ages to choose the appropriate examination to maximize the safety of the mother and fetus.