Generally speaking, the best age for a woman to have a baby is between 23-30 years old, preferably no older than 30. The best age for a woman to give birth to her second child should also be within this range. At this age, a woman’s whole body is fully developed and her eggs are of high quality, which will reduce the risk of delivery if she chooses to conceive and give birth during this period. In addition, women who become pregnant between the ages of 23 and 30 have good fetal growth and development, and the incidence of premature births, malformed and demented children is relatively much smaller. The couple in this age group is more experienced and energetic, capable of raising babies and children, so between the ages of 23 and 30 is the best age for women to give birth. After the introduction of the “separate two-child” policy, many couples are beginning to consider the issue of having two children, but there are many couples who are ready to have two children have exceeded the best age of childbirth, especially a small number of 70s also want to join the ranks of “making people”. How to reduce the risk of childbirth and improve the quality of childbirth is a difficult problem in front of these “over-age” women! Therefore, it is important to fully understand the risks of having children at an advanced age and to know how to reduce them. After the age of 35, women’s ovarian function begins to decrease, the quality of eggs will decline, and the chances of natural pregnancy will decrease, making it relatively more difficult to conceive a second child; pregnancy over 35 years old is a high-risk pregnancy category, and the chances of miscarriage, premature birth, gestational hypertension, gestational diabetes and other pregnancy complications increase greatly; fetal chromosomal diseases, fetal abnormalities and other risks The risk of fetal chromosomal diseases and fetal malformations will also increase accordingly. In order to have a healthy baby, the first step is to prepare for pregnancy. In order to reduce the risk of childbirth, it is recommended that couples start the following preconception checkups three months before conception. Routine preconception checkups for women mainly include: routine blood, urinalysis, A function, liver and kidney function, blood sugar, infectious disease examination (for syphilis serum antibody test, HIV antibody test, hepatitis, chlamydia test), four eugenic tests (rubella virus, cytomegalovirus, toxoplasmosis and herpes simplex virus, etc.) and genetic disease examination, reproductive system examination (cervical cancer screening, ultrasound, etc.) In addition, the male partner needs to check the semen routine. If there are no rubella virus antibodies in the body, it is best to get a rubella vaccination six months before pregnancy to prevent infection during pregnancy. Rubella, cytomegalovirus, toxoplasmosis, and herpes simplex are potentially teratogenic if contracted in early pregnancy. Those who have previously given birth to a malformed child or have a hereditary disease will be at the same risk of becoming pregnant again, so prenatal screening and diagnosis must be done. In addition, before preparing for the birth of a second child, the couple had better exercise to improve physical fitness; change bad habits and ways of life, pay attention to balanced nutrition, maintain weight within a reasonable range; cheerful mood, maintain a good mood and state of mind, in the best condition to meet the arrival of the baby.