How long does a women carry a baby till its ready to be born?

A woman typically carries a baby for about 40 weeks, or roughly nine months, from the first day of her last menstrual period to the baby's birth. This period is divided into three trimesters, with the baby being considered full-term at 37 to 42 weeks. Birth can occur anytime during this range, with 39 to 40 weeks being the optimal time for the baby's health. Factors such as maternal health, baby's development, and other circumstances can influence the exact timing of delivery.