Physical effects of childbearing at the age of 39 on children
The choice of childbearing age has an important impact on the physical health of children, including the birth at the age of 39. The following will elaborate on the physical impact of childbirth at the age of 39 on children from four aspects: physiological development, genetic diseases, pregnancy health and medical risks.

1. Physiological development
The physiological development of children mainly involves the growth of height and weight, the development of organs and the formation of muscles and bones. Mothers who give birth at the age of 39 may face problems that mothers who give birth earlier may not encounter. Mothers of higher childbearing age may have certain restrictions on the physical development of the fetus. Research shows that children born to mothers over the age of 39 are more likely to have low weight, low length and other developmental problems.
In addition, mothers with a higher childbearing age may also affect their children's intellectual development. A large number of studies have found that the IQ of children born to late married and late childbearing mothers is generally low, which may be related to a series of physiological changes caused by the increase of mothers' age.
2. Genetic diseases
With the growth of age, the quality and quantity of eggs of pregnant women will also decline, increasing the risk of genetic diseases at birth. With the decline of egg quality, the risk of chromosomal abnormalities or gene mutations will also increase. For example, the risk of a child suffering from chromosome abnormalities such as Down syndrome will increase with the age of the mother.
In addition, the onset age of some genetic diseases will be affected by the mother's childbearing age. When the mother is older, some genetic diseases may come on ahead of time, bringing risks to the child's health.
3. Health during pregnancy
Mothers who give birth at the age of 39 may face some challenges in their health during pregnancy. Higher childbearing age is associated with an increased risk of pregnancy complications such as pregnancy induced hypertension, diabetes and postpartum depression. These pregnancy complications may have a negative impact on the healthy development of children.
In addition, diet and living habits during pregnancy will also have an impact on children's health. Older mothers are more likely to be restricted by diet and living habits during pregnancy, which may affect their children's nutrient intake and living environment, thus having a certain impact on their children's health.
4. Medical risks
Mothers who give birth at the age of 39 face higher medical risks. As the age increases, the female reproductive system function will decline to a certain extent, such as the number and quality of eggs. This may lead to some reproductive health problems, such as the need for treatment methods such as infertility or IVF. In addition, the risk of complications during pregnancy will also increase, requiring more rigorous monitoring and treatment.
For children, due to the progress of medical technology and health care level, although there are certain risks for older mothers to give birth, doctors and hospitals can take a series of measures to reduce these risks and ensure that the risks of premature delivery, low weight and other complications can be as low as possible.
Summary:
To sum up, the physical impact of childbirth at the age of 39 on children is mainly reflected in physiological development, genetic diseases, pregnancy health and medical risks. Higher childbearing age may limit the physical development of children, increase the risk of genetic diseases, increase the incidence of complications during pregnancy, and cause a series of medical risks. However, the development of medical technology and the support of professional hospitals can reduce these risks and ensure the healthy growth of children.