The following preparations are recommended before conception: First, do health checkups, such as gynecological examination to understand the development of uterine attachments, exclude the possibility of inflammation, and exclude the possibility of gynecological tumors. Second, do laboratory tests, such as routine blood and urine tests, liver and kidney functions, sex hormone six, and thyroid function tests. In addition, blood tests should also be taken for any abnormalities in the five eugenics items. If there is a recent viral infection, it may lead to fetal malformation and it is recommended to prepare for pregnancy after it is cured. Before conceiving, it is also necessary to adjust the diet, for example, both husband and wife should enhance nutrition, and both of them should be advised to quit smoking and alcohol, and stay away from second-hand smoke. Oral folic acid tablets are also needed before pregnancy, the main purpose of which is to prevent the possibility of fetal neural tube abnormalities.