The purpose of pre-pregnancy check-ups is eugenics. Science has developed to the point where it is possible to check some common diseases during pregnancy to prevent common problems during pregnancy when you are not pregnant, to avoid the passive situation when problems arise later in pregnancy and then deal with them, and to give health care guidance, such as guidance on sex life, nutrition, etc. Pre-pregnancy check-ups include three main areas of examination: first, examination of the two organs (uterus and mammary glands) to be used in pregnancy to check for inflammation or tumors, normal morphological development, and to understand whether these two organs are capable of performing the task of pregnancy; second, eugenic examination, the main purpose of which is to pre-screen for common and unique diseases during pregnancy, such as miscarriage, abnormal thyroid function leading to fetal intelligence problems, maternal and child blood group Pre-examination for liver disease during pregnancy, gestational diabetes, fetal growth retardation, heart disease, etc.; third, examination for the four major infectious diseases (hepatitis B, hepatitis C, AIDS, syphilis). In addition, you have irregular menstruation and need to know the endocrine situation. It is recommended to take the basal body temperature and, if necessary, to take blood during menstruation to check the endocrine situation, and if there are gynecological endocrine problems, such as ovulation disorders that lead to a decreased chance of conception, gynecological endocrine treatment is needed to help conception.