First-born babies are not the best, and the quality of the fetus has nothing to do with whether it is a first-born baby or not. Fetal quality is related to the quality of the sperm and egg and the conditions of the mother’s pregnancy. Although the pregnant mother’s uterus is in good condition when she conceives a baby for the first time, it is not good if the mother has a genetic or underlying disease with chromosomal abnormality, regardless of whether it is the first baby or not. For older first-time mothers, adequate prenatal screening is needed during pregnancy to rule out chromosomally abnormal fetal disorders and to ensure eugenic fertility. For women in the optimal childbearing age, they should do a good job of preparing for pregnancy, take folic acid supplements, maintain a good mood, exercise appropriately during pregnancy, and don’t be overly nervous just because it’s your first child. Regardless of whether the woman is of advanced or suitable age, after pregnancy is confirmed, she should undergo obstetric examination on time, take good nutrition during pregnancy, maintain good mood, and go to the hospital in time to consult a professional doctor to take professional measures if there is any discomfort.