Add Yahoo as a preferred source to see more of our stories on Google. (Blend Images - Peathegee Inc/Tetra Images/Getty Images) Evolutionary theory has revolutionized the way we understand humans – yet ...

Human birth is far more challenging than that of other primates. In 1960, anthropologist Sherwood Washburn proposed a widely accepted explanation for the tight squeeze a baby experiences passing ...

Medical intervention in human birth has become so widespread that spontaneous delivery is an increasingly rare event. Yet convincing evidence reveals an underlying 24-hour biorhythm, reflecting a ...

According to a new study, chimpanzees, like humans, must contend with a confined bony birth canal when giving birth. In humans, the problem was exacerbated by our unique form of upright walking since ...

His innovations, including homelike delivery rooms and birthing pools, were based on his belief that “human birth cannot work as long as a woman is thinking.” By Adam Nossiter Michel Odent, a French ...

3D simulation of the birth canal of chimpanzees with (B) the fetal head in a fully extended position, the typical head alignment in apes, and (C) the fetal head in a fully flexed position, the usual ...