A woman usually has 400-500 eggs in her lifetime. However, women usually have one mature egg expelled only about once a month. The rest of the eggs will shrink on their own. If you have intercourse during ovulation, you will be able to increase your chances of conceiving, and you will be able to prepare for pregnancy normally. The best age for women to give birth is generally around 25-29 years old, after 30 years old ovarian function and hormone levels will decline greatly, which is not conducive to normal conception, women older than 35 years old, known as advanced maternal age, pregnancy is easy to cause congenital developmental malformations of the fetus. Therefore, it is important to prepare for pregnancy at the optimal age of conception to ensure the quality of eggs.