The baby will normally be born within 37-42 weeks of pregnancy, and there will be individual differences that will affect this. Generally speaking, after a woman becomes pregnant, she usually needs to calculate her due date based on her last menstrual period, so as to determine the maturity of the fetus in the uterus. The due date is not the exact time of birth of the fetus, the normal due date is 40 weeks, and delivery within two weeks before or after the due date is normal. In addition to the baby will be delivered within 37-42 weeks, it may also be delivered before 37 weeks, newborns delivered at 28-37 weeks is known as preterm labor, because at this time the fetus is not yet fully developed. In the case of a pregnancy that has not yet been delivered beyond 42 weeks, it can be referred to as an overdue labor, which may occur due to placental decompensation, lack of amniotic fluid, and umbilical cord around the neck, thus increasing the chances of danger. It is recommended that women should go to the hospital for regular checkups after pregnancy, especially in the late stages of pregnancy, so as to increase the number of checkups and understand the development of the fetus in the womb.