There are more preconception tests. Pre-conception check-ups are the basis for ensuring optimal fertility. Pre-conception check-ups are usually started 3-6 months before preparing for pregnancy. The contents of preconception checkup for women mainly include: 1. reproductive system examination: routine examination of reproductive system, ultrasound examination, routine laboratory test of white belt. 2. general physical examination: including height, weight, blood pressure, heart and lung auscultation, etc. 3. general laboratory examination: including routine blood, urine, blood type, liver function, kidney function, blood sugar, blood lipid, etc. 4. full set of detoxification examination: including rubella virus, toxoplasmosis, cytomegalovirus, etc. 5. family history of genetic diseases. 5.Chromosomal examination is required if there is a family history of hereditary diseases. 6.Sex hormone six tests, thyroid function tests, etc.