It has to do with genes being passed on from mother to baby.
Caesarean sections have been used for years, going all the way back into Roman empire times. But back in the 60s, c-sections were required on only 30 babies per 1000. Today, it’s 36 per 1000, and doctors believe that, while unfortunate, women with more narrow pelvises would typically die along with the child during the birthing process. However now, due to c-sections, the narrow pelvis gene can now be passed onto the baby, and in the case of a girl, a future c-section would be necessary.
Dr Philipp Mitteroecker says “women with a very narrow pelvis would not have survived birth 100 years ago. They do now and pass on their genes encoding for a narrow pelvis to their daughters.”
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