Human variation in the shape of the birth canal is significant and geographically structured

Proceedings of the Royal Society B Vol/Iss. 285(1889) The Royal Society Publishing Published In Pages: 1-9
By Betti, Lia, Manica, Andrea


Contrary to the 'obstetrical dilemma,' there will be geographical variation in the shape of the female birth canal.


Females in sub-Saharan African populations typically have deeper birth canals whereas the birth canals of Native Americans are wider. Asians, Europeans, and North African females typically have an intermediate birth canal morphology.


Test NameSupportSignificanceCoefficientTail
Analysis of Variance (ANOVA); post hoc Tukey testSupportedUNKNOWNUNKNOWNUNKNOWN


Variable NameVariable Type OCM Term(s)
Geographical LocationIndependentLocation
Female Birth Canal DependentAnthropometry