The preparations before pregnancy are as follows: 3-6 months before pregnancy both spouses should undergo health checkups, and the male partner’s checkups include blood routine, urine routine, liver and kidney function, and infectious disease examination. If there is a history of bad pregnancy and childbirth, a routine semen examination should be performed, and the four eugenic tests should be carried out. For women, there are more checkups, including routine blood test, routine urine test, liver and kidney function test, thyroid function test, electrocardiogram test, eugenics test, infectious disease test, routine white belt test, mycoplasma test, chlamydia test, and color ultrasound test. If there is no abnormality in the examination, the female partner should take oral folic acid in advance and take oral folic acid three months in advance to prevent fetal neurovertebral malformation, and she can enter the state of pregnancy preparation to prepare for pregnancy.