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Description
The size of birth canal shows that Neanderthal childbirth was about as difficult as in present-day humans. The shape indicates that Neanderthals retained a more primitive birth mechanism than modern humans.
Childbirth in humans is more complicated than in other primates. Unlike the situation in great apes, human babies are about the same size as the birth canal, making passage difficult. The birth mechanism, a series of rotations the baby must undergo to successfully navigate its mother’s birth canal, distinguishes humans not only from great apes but also from lesser apes and monkeys.

Description
The size of birth canal shows that Neanderthal childbirth was about as difficult as in present-day humans. The shape indicates that Neanderthals retained a more primitive birth mechanism than modern humans.
Childbirth in humans is more complicated than in other primates. Unlike the situation in great apes, human babies are about the same size as the birth canal, making passage difficult. The birth mechanism, a series of rotations the baby must undergo to successfully navigate its mother’s birth canal, distinguishes humans not only from great apes but also from lesser apes and monkeys.