Nature.com June 30, 2026 • 01:16

Comparative primate analysis shows that humans are not unique in having a tight cephalopelvic fit at birth - Nature

Analysing cephalopelvic proportions among 29 extant primate species, the authors show that a tight cephalopelvic fit is not unique to humans, with comparable or tighter fits occurring in several non-human primate species, including macaques, squirrel monkeys …

<li>Schultz, A. H. Sex differences in the pelves of primates. Am. J. Phys. Anthropol.7, 401423 (1949).
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</li><li>Leutenegger, W. Beziehungen zwischen der N… [+10601 chars]

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Comparative primate analysis shows that humans are not unique in having a tight cephalopelvic fit at birth - Nature

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