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متن کاملNeandertal birth canal shape and the evolution of human childbirth.
Childbirth is complicated in humans relative to other primates. Unlike the situation in great apes, human neonates are about the same size as the birth canal, making passage difficult. The birth mechanism (the series of rotations that the neonate must undergo to successfully negotiate its mother's birth canal) distinguishes humans not only from great apes, but also from lesser apes and monkeys....
متن کاملWhen did the modern human pattern of childbirth arise? New insights from an old Neandertal pelvis.
H uman birthing is difficult owing to a tradeoff between large neonatal brain size and maternal pelvic dimensions, which are constrained by aspects of bipedal biomechanics (1, 2). The net effect is that human neonatal head size closely matches maternal pelvic dimensions, unlike in our closest living relatives, the great apes, whose pelvic dimensions are larger than neonatal head sizes. This siz...
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ژورنال
عنوان ژورنال: American Journal of Physical Anthropology
سال: 1992
ISSN: 0002-9483,1096-8644
DOI: 10.1002/ajpa.1330350605