The optimal age for childbirth is between 23 and 30 years for women and 30 to 35 years for men. The optimal age for fertility is between 23 and 30 years for women and 30 to 35 years for men, preferably no older than 30 years for women and no older than 35 years for men. Women’s whole body is fully developed and mature during this period, and the quality of eggs is high. If pregnancy occurs during this period, women have fewer complications, less risk of delivery, better fetal growth and development, and the lowest incidence of preterm birth, malformed and demented children. Genetic influences Pregnant women are too young and not yet fully developed themselves, which can have a negative impact on the development of the fetus. From a nurturing point of view, the social experience of the parents also directly affects the baby’s education. However, with increasing age, the egg cells also age, the chromosomes of the eggs decline, and the chances of some genetic diseases subsequently increase. That is, when a pregnant woman is too old, the incidence of fetal mental developmental disorders increases and there is a risk of mental retardation or other neurological developmental abnormalities. Likewise, the father should not be too old to avoid a decrease in sperm vitality and a relative increase in the incidence of fetal diseases. If the sperm is abnormal, miscarriage, premature birth and congenital malformation of the baby are likely to occur after conception. The effect of variability Variability: Generally, the advantages of the parents are inherited, while the deficiencies of the parents are mutated. From a genetic point of view, the younger the childbearing age, the greater the variability, and the more the fetus combines the advantages of the parents; while the older the age, the less the variability, which means that the possibility of passing down the deficiencies and defects of both parents is higher. In life, it is found that some children concentrate on the strengths of both parents, while another child concentrates on the deficiencies of the parents, which is related to this genetic variability. Of course age is not an absolute factor, but choosing the best age for childbirth helps to improve the quality of the birth and avoid disadvantages. The advantages of pregnancy at the optimal childbearing age The mother-to-be is between 23 and 30 weeks of age, when the woman’s whole body is fully developed and her eggs are of high quality; if she carries a child to term, there is less risk of delivery, the fetus grows and develops well, and the incidence of premature births, malformed children and demented children is low. If you get pregnant earlier than 20 years old, the fetus will compete with the developing mother for nutrients, which is not good for the mother’s health and fetal development. In contrast, when pregnancy occurs too late, follicles accumulate in the ovaries for too long, chromosomes age, and decline occurs. The older you are, the greater the chance of mutations in the genetic material, which can lead to congenital stupidity and various malformations. The age of the father-to-be should not be ignored. Research shows that the best age for men to have children is 30 to 35 weeks old. This is the period when the quality of male sperm reaches its peak, and at this age men are intellectually mature and have more experience in life, especially in caring for and loving their wives and having the ability to raise babies and children. If you are too old, the androgens in your body gradually decay, the genetic mutation rate of sperm increases accordingly, and the quantity and quality of sperm are not guaranteed. The first thing you need to do is to choose the right time to get pregnant, especially if you want to have your second child at the best possible age. It is also important to pay attention to the time interval between the birth of the second child and the first child. If the first child was born by normal birth, the interval between the birth of the second child should be more than 1 year; if the first child was born by caesarean section, the interval between the birth of the second child should be more than 2 years. In addition, advanced maternal age needs to be noted, that is, women who are over 35 years old and pregnant. In general, the intrauterine development of the fetus is relatively delayed in advanced mothers, which increases the possibility of preterm delivery and the possibility of prolonged or difficult labor during delivery. There is nothing more worrying than miscarriage for senior mothers. According to incomplete statistics, about 15% of pregnant women over the age of 35 will suffer a miscarriage; 25% of pregnant women around the age of 40 will face this situation; and after the age of 45, half of pregnant women are at risk of miscarriage.