Maternal age is one of the risk factors considered in Down syndrome screening  It is generally believed that the older the mother, the higher the risk of genetic abnormalities in the baby  When there is an extra chromosome 21 in the egg, the fetus will Down syndrome appears  As women age, the risk of such abnormalities increases
The uterus basically does not change with age. As long as the hormone level is sufficient, the uterus of elderly women can also raise the fetus normally
 Recently, some experts have begun to question this screening method, thinking that genetic abnormalities are not just a matter of the woman's age