Boa constrictor mothers experience a gestation period that lasts for approximately 100 to 150 days. Once the young are physically formed, they leave the confine of the mother's body via the cloaca cavity. The litters typically consist of approximately 25 baby snakes, but have a range of anywhere from a mere 10 to a massive 64 little ones. Through pure instinct, young boa constrictors generally have the ability to stay alive from day one. Since the internal embryonic development of the young is rather physically taxing and strenuous for the mother boa constrictors, it is crucial for them to have time for healing after birth. Without healing, the mother snakes are not capable of adequately replenishing their fat supplies.