How long after the baby's head engages will labor begin?

There is no fixed answer to the question of how long after the fetus descends into the pelvis labor will begin, as it is influenced by multiple factors, including the mother's physical condition, fetal development, and experience with previous deliveries. For first-time mothers, delivery usually occurs about 1-2 weeks after the fetus has descended into the pelvis, although it may happen earlier or later. This is primarily because the pelvis and birth canal of a first-time mother are relatively tight and require more time to adapt to the process of delivering the baby. For women who have given birth before, the pelvis and birth canal have already experienced a delivery and are relatively more relaxed. Therefore, labor may occur more quickly after the fetus descends into the pelvis. Some multiparous women may go into labor approximately 8-10 hours after fetal descent, although this is not always the case.