Before preparing for children, both men and women are advised to go to the hospital for a full body checkup, maintain a healthy lifestyle, and supplement nutrients. 1. Do a full body checkup: It is best for both men and women to go to the hospital for a full body checkup, which includes, but is not limited to, urine routine, fecal routine, liver function, and chromosome checkup. 2. Maintain a healthy lifestyle: Both men and women should maintain a healthy lifestyle, quit smoking and drinking at least half a year in advance, get enough sleep, and not overwork. Maintain a good state of mind and exercise appropriately. 3. Supplemental nutrients: women must supplement folic acid under the guidance of a doctor, which can prevent fetal malformations; moderate intake of fresh vegetables, fruits, meat, eggs, milk, soy products and other foods rich in high-quality protein, to ensure that the body is supplemented with sufficient nutrients. Parents who are planning to have children are advised to consult a specialist at the hospital in time for relevant examinations and scientific preparation for pregnancy.