Preterm birth occurs when a baby is born before 37 weeks of pregnancy have been completed. A full-term pregnancy typically lasts about 40 weeks. Babies born preterm may face various health challenges, as their organs may not be fully developed. There are several factors that can contribute to preterm birth, including multiple pregnancies, infections, and chronic health conditions in the mother. Healthcare providers monitor at-risk pregnancies closely to help reduce the chances of preterm delivery and ensure the best possible outcomes for both the mother and the baby.