The timing of a baby's birth—whether early, on time, or late—is largely unpredictable. Only about 5% of babies are born on their exact due date, and most babies are born within two weeks before or after this date, between 37 to 42 weeks of pregnancy. Several factors can influence the timing of birth, including first-time versus subsequent pregnancies, maternal health, and baby size. Babies born before 37 weeks are considered early or preterm, while those born after 41-42 weeks are considered late or post-term. Doctors often recommend delivery by 42 weeks due to increased risks. To estimate timing, due dates are most accurately calculated using early pregnancy ultrasounds, especially between 11 and 14 weeks. Last menstrual period can also be used but is less reliable if cycles are irregular. There is currently no precise way to predict if a baby will come early or late, but family history and the timing of previous births can offer some clues. Signs of labor such as regular contractions, backache, or water breaking are indicators that birth is near but cannot precisely predict early or late arrival. In summary, there is no definitive way to tell if a baby will come early or late, though due dates estimated by ultrasound provide a best guess window, and labor signs indicate imminent birth. Medical advice recommends monitoring and care as the due date approaches to address early or late labor scenarios appropriately.
