Generally between the ages of 25-30 is a more appropriate age for women to have children, preferably no older than 35. This is because the various organs of a woman’s reproductive system develop to maturity around the age of 24-25. If you give birth too early, the rate of difficult births will increase, and the rate of miscarriage, premature birth, and fetal malformation will also increase, and the proportion of birth defects will increase significantly when you are older, because the quality of egg cells will have problems when women are older, and when meiosis occurs, it is also easy to have chromosomal non-separation, which will lead to some fetal birth defects, most notably such as trisomy 21, which will have low intelligence. Therefore, it is recommended that women have children between the ages of 25 and 30, and preferably not older than 35, as 35 years of age or older is called advanced age, and the quality of her eggs may have problems, resulting in a higher rate of birth defects.