Nowadays, it is common for young people to get married late and have children late. In the past, you could tell your family that the state policy encourages it, but now that the state has canceled this policy, how should you explain to your family? And from the perspective of eugenics, it does not promote late marriage and late childbearing. Why is this? Read on together. Domestic and foreign data show that the total incidence of birth defects is generally in the 3-6%, ranked in the perinatal birth defects of the first five diseases are: congenital heart disease (120.11 / 10,000), polydactyly, toes (21.48 / 10,000), G6PD deficiency (18.21 / 10,000), cleft lip / palate (14.32 / 10,000), clubfoot (11.66 / 10,000), the first five types of diseases accounted for perinatal birth defects 59% of birth defects. The researchers pointed out that the biggest threat faced by women of advanced maternal age is chromosomal disorders, “because with the mother’s age, especially above 35 years old, the rate of chromosomal abnormalities in their eggs is very high, and the chromosomal abnormalities of the fetus that is born is also very high, so before pregnancy, pregnant women have to avoid adverse exposure, the key is still in the early stages of pregnancy, to accept the relevant chromosomal screening and diagnosis. ” So, how do senior couples prepare for the second child? What need to pay attention to? For senior couples to prepare for the second child, first of all, they should have confidence, relaxation, regular life, adjust the work life routine, so that they can be in the best state to meet the arrival of the new life. Couples can do some pre-pregnancy checkups in advance, and can treat diseases that affect pregnancy such as thyroid disease and diabetes in advance. Although not getting pregnant for more than a year is called infertility, but as senior women need to race against time more, so senior couples who have been preparing for pregnancy for more than six months and are infertile, they can take infertility related tests in advance. Especially for women with a history of multiple miscarriages or ectopic pregnancy or a history of pelvic inflammatory disease or dysmenorrhea or menstrual cycle changes, they need to rule out tubal abnormalities, endometriosis or adenomyosis, ovarian hypoplasia, or polycystic ovary syndrome, which may affect lead to infertility. Men who are engaged in high-temperature work, or men who sit for a long time without exercise, such as office workers, drivers, etc., it is best to advance the semen test. If either of the male or female partner needs to undergo IVF to help conceive, they can choose to undergo fertility treatment in due course. Tips: We hope that young people of marriageable age can realize the impact of marriage and childbearing age on the next generation earlier, and raise children before it is too late, so that your excellent genes can be passed on.