1. Childbearing age Childbearing age is one of the important factors that affects the possibility of pregnancy. Women\’s fertility decreases with age. The best age for women to have children is between 20 and 35 years old, and the best age for childbearing is between 25 and 30 years old. As a woman ages, the number and quality of her eggs decrease, so the likelihood of pregnancy gradually decreases. For example, women over the age of 35 are significantly less likely to become pregnant. Moreover, women over the age of 35 are also more likely to experience pregnancy complications, such as placental abruption and fetal growth retardation. 2. Lifestyle Lifestyle also affects the possibility of pregnancy