The tests needed to prepare for a child include: first, male examination: sperm routine, liver function, urinary ultrasound, blood routine, electrocardiogram. Second, female examination: reproductive system examination, blood routine, urine routine, rubella, toxoplasmosis, cytomegalovirus three, liver function, oral examination, gynecological endocrine examination. If one of the couple has a family history of genetic diseases, the couple also needs to check for chromosomal abnormalities. The preparation time is usually 3 months, and women can take folic acid tablets 0.4mg daily starting 3 months before conception, avoid staying up late at night, and insist on exercising for half an hour every day. Men need to quit smoking and drinking and avoid irregularities in work and rest. Abstain from sex during pregnancy preparation.