The phenomenon that we are facing today in relation to the field of gynecology and obstetrics is the increase in the age of marriage and, by nature, the increase in the age of pregnancy. Every girl has about one million eggs at birth, and the number of eggs decreases to about 300 during the fertile years. As the age increases, the eggs lose their quality and will no longer have their original quality. Genetic abnormalities and infertility are among the most important threats that make couples face many challenges. In fact, gynecologists and obstetricians believe that pregnancy at any age has its advantages and disadvantages, and when a person decides to become pregnant, he should be careful. Don't miss reading this article by Dr. Zahra Seifi, a gynecologist in Tehran, to get to know the ***best age to get pregnant***. - **before the age of 20** According to statistics, trying to get pregnant before the age of 20, that is, at a young age, can have complications for both the mother and the baby. Among these complications are premature birth, high blood pressure and anemia in the mother, maternal death, fetal death and insufficient growth of the fetus inside the womb. According to gynecologists, due to insufficient growth of female organs and as a result of difficulty in giving birth, other problems are seen in young girls, such as ruptures of the tissue of the birth canal, severe bleeding during and after childbirth, and finally, the uterus does not contract in childbirth before the age of 20. In addition to the complications mentioned above, infection and bleeding are common after pregnancies under the age of twenty. - **Twenties** According to researches, the fertility of most women reaches its peak at the age of 24, and for this reason, it is believed that this age group is the best time for women to become pregnant. Also, the risk of abortion from 20 to 24 years is only about 10%, while between the ages of 35-39, this risk increases to 18%. Another reason for believing in this decade of age for pregnancy is that people aged 20 to 28 are less prone to female problems such as fibroids and endometriosis. - **thirties** As women age, the chance of pregnancy becomes less than before, and the risk of miscarriage and birth of a child with a genetic disease such as Down syndrome is much higher. In the mid-thirties, the probability of infertility increases, and the risk of genetic abnormalities in the fetus is also a concern. The probability of an ectopic pregnancy is higher in a 35-year-old woman compared to a 24-year-old woman, and the probability of having a cesarean section is higher for women over 35 years old. A 35-year-old pregnant woman has a 40% chance of having a cesarean section to give birth to her first child, and the risk of giving birth to a child with Down syndrome at this age is one in every 302 births. Obstetricians and gynecologists believe that women aged 30-39 need more prenatal care. Therefore, the gynecologist recommends tests such as amniocentesis, chorionic villus examination, and other fetal screening tests.