It is important to have a baby before it is too late. However, the brutal social competition, the increasing cost of living, and the perfect expression of personal values make people have children at a later and later age. Missing the optimal age of childbearing, physiological will face many risks. 1, egg quality Egg cells are what every woman is born with, but since they come out of their mother’s womb, the eggs in a woman’s body are constantly being polluted and affected by the environment. Look around to breathe the turbid air, look at the news to eat into a variety of substandard products, to the computer to work in the face of endless radiation and light pollution. Medical appraisal shows that the best age for women to give birth is 23-28 years old. When a woman chooses to give birth to a baby at the age of 25, the quality of the eggs in the body is one of the best moments in the developmental stages of the female body. The later the time of delivery, the more the eggs are affected by the environment and pollution, and the quality of the egg cells decreases, making them susceptible to chromosomal abnormalities in the eggs, which can lead to an increase in birth defects. The incidence of congenital stupid fetuses increases exponentially with the age of the pregnant woman, with studies predicting that if it is about 0.11% at the age of 25-29 years, it will increase to 0.26% at the age of 30-35 years, and will rise to 0.56% at the age of 36-40 years. This is the greatest risk faced by women who give birth over the age of 35. 2, Mode of delivery It will be much easier to have a normal labor at the age of 25 as compared to 35. This is because women at 25 years old have the basic physiological conditions for a normal labor with a strong uterine expansion and contraction force, good elasticity of the birth canal, and softness of the pelvic joints. At 35 years of age, the risk of difficult labor is high, so more women opt for a cesarean section. This is because as women age, the birth canal and the joints of the perineum and pelvis harden and are not easily dilated, and the contractility of the uterus and the extension of the vagina decrease. In some cases, the opening of the uterus is slow or even impossible during labor, which prolongs the delivery time and makes it easy for hemorrhage and obstructed labor to occur. Because of this, the cesarean section rate of elderly women is higher than that of ordinary women. Complications of pregnancy Complications of pregnancy is the third major risk faced by women of advanced maternal age. Because of their age, many women of advanced maternal age may have mild diabetes or high blood pressure, but usually have normal body functions and are not aware of them. Once pregnant, changes in body functions and hormone levels will induce these hidden diseases, which will not only affect the normal development of the fetus, but also put the life of the pregnant woman at risk. In addition, studies show that the incidence of breast cancer in women who give birth for the first time at the age of 35 or above is much higher than those who give birth for the first time before the age of 30, and the older the age of giving birth for the first time, the higher the incidence of breast cancer. 4.Postpartum Recovery The metabolism and cell regeneration function of women at the age of 25 are better than that of women at the age of 35. With proper postnatal care, they can regain their figure within half a year. Pregnancy, childbirth, a special physiological process of different degrees of damage to the female body, especially the pelvic floor muscles and reproductive tract will be greatly tested, and the recovery ability of the elderly pregnant women themselves are not strong, many people are more likely to have perineal pain, pain during sexual intercourse, uterine prolapse and other problems after delivery. 5, energy and physical strength In addition to these physical risks, having a baby after 35 years of age will also face a problem of parenting and education. As an older mother, in terms of energy and physical strength is certainly not as good as those young parents. After giving birth to a child, you have to devote double the energy to work, while your parents are already old and may not have the energy to help share some of the responsibility of childcare……. All of this is a problem that older mothers need to face. And choose to 25 years old to give birth to a baby in this aspect of the advantage is very obvious.