The main items of pre-pregnancy examination are: 1, examination of reproductive system and vaginal inflammation. 2, a full set of deformities, including rubella, Toxoplasma gondii, cytomegalovirus. 3, liver function, liver function test currently has two functions, large liver function in addition to hepatitis B, but also includes blood sugar, bile acid and other items. 4. Urine routine is helpful for early diagnosis of renal diseases. 5, oral examination, if there is toothache during pregnancy, considering the impact of therapeutic drugs on the fetus, treatment has an impact on both the mother and the fetus. 6. Gynecological endocrinology, including follicle stimulating hormone and luteinizing hormone.