Trade-offs in the pelvic floor contribute to the evolution of difficult childbirth in humans

Compared to most other primates, humans are characterized by a tight fit between the maternal birth canal and the fetal head, leading to a relatively high risk of neonatal and maternal mortality and morbidity. Why the human birth canal has not evolved to be larger and reduce these risks has long been a topic of debate. A new study, published in PNAS and co-led by Dr. Nicole Grunstra, affiliated scientist in the Mammal Collection at the Natural History Museum of Vienna, highlights the role of the pelvic floor in constraining human pelvic evolution.

Quelle: IDW Informationsdienst Wissenschaft