Preparation for pregnancy is a process in which the couple prepares for pregnancy, because it takes a long time for the egg to develop before the dominant follicle can be formed, and almost this time is about 85 days; the male sperm will take almost 72-90 days to develop healthy sperm, so it takes almost three months. Generally speaking, the length of time to prepare for pregnancy also needs to be decided according to the individual’s physical condition. During the preparation period, women need to take folic acid for three months in advance to prevent fetal neural tube deformities; both spouses should also pay attention to quit smoking and drinking, and pay attention to a balanced diet. Scientific preparation for pregnancy should be carried out under the guidance of a professional doctor, do not take drugs or exposure to radiation during preparation for pregnancy, preparation for pregnancy also need to go to the hospital to improve the pre-pregnancy physical examination, such as routine blood, function, infectious diseases, etc., found abnormalities in a timely and symptomatic treatment.