What is the typical length of a full-term pregnancy?

The typical length of a full-term pregnancy is around 40 weeks. This duration is measured from the first day of the last menstrual period (LMP) to the birth of the baby. The 40-week timeframe is generally divided into three trimesters: the first trimester spans from weeks 1 to 12, the second from weeks 13 to 26, and the third from weeks 27 to 40. It is important to note that pregnancies can be considered full-term anywhere between 39 to 40 weeks. Deliveries before 37 weeks are classified as preterm, while those after 42 weeks are referred to as post-term. Understanding this timeframe is crucial in prenatal care and monitoring maternal and fetal health throughout the pregnancy.