A recent study is suggesting that the regular use of Cesarean sections for delivering babies is affecting human evolution. Dr. Philipp Mitteroecker from the University of Vienna published this as an answer to a question growing within the wombs of mothers worldwide for years.
It all has to do with what's called the "obstetric dilemma." Bigger babies have a better chance of survival, but women are pressured to have narrow pelvises for better walking and less risk of premature births. Problem is, that combo makes them too big to fit through the pelvis and would have killed both of them during childbirth.
The study doesn't confirm this completely. According to Dr. Louise Johnson at the University of Reading she says there are a lot of factors not being taken into account. For example, women are giving birth later in life (which affects pelvis size) or how multiple cesarean births bring more risks.
Daghni Rajasingam, an obstetrician outside of the study, also voiced her opinion on what's increasing the number of C-sections. According to her, it could simply be a matter of diabetes and obesity that's making bigger babies, not genes.
Mitteroecker's work is purely theoretical and just working on rates and models on obstructed childbirths. He's only doing it to prove a point, not as a way to negatively target against C-sections. After all, it serves a safe alternative that women did not have for quite a long time.