Normal women can ovulate after the onset of menstruation, and in our country normal women are fertile after the onset of menstruation at around 12 to 14 years of age. Between the onset of menstruation and menopause, normal women are fertile. The time of menarche is different for different individuals. The average age of menarche for women in China is 12~14 years old, and the average age of menopause is 49 years old. The optimal age for women to have children is between 23 and 30 years old, but having children too early or too late may affect the health of the woman and the child. If you give birth too early, such as before the age of 20, the probability of miscarriage, preterm labor, obstructed labor, fetal malformation, and the incidence of complications in their pregnancies increases. If you give birth too late, for example, if you give birth at the age of 35, the rate of obstructed labor is significantly higher, which affects both the pregnant woman and the fetus, and the rate of fetal malformations after conception is also increased in comparison. If you have any other questions, it is recommended that you consult a medical professional for guidance.