Sexual dimorphism of the human pelvis illustrated.

The balls represent the size of a newborn baby's head, which will pass through the female pelvis fairly easily, but will get stuck in the male pelvis

[read more: https://t.co/eRMkMC3C0y]pic.twitter.com/w5a71udPLC

— Massimo (@Rainmaker1973) December 7, 2022