Caesareans and evolution.
Bailey
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D044383:Black People; D002585:Cesarean Section / Q000706:statistics & numerical data* / Q000639:trends; D005260:Female; D006801:Humans; D007744:Obstetric Labor Complications; D010388:Pelvis / Q000033:anatomy & histology*; D011247:Pregnancy; D044465:White People