A Long-Standing Theory of Childbirth Is a Myth

A long-standing theory that human childbirth is uniquely difficult has been challenged by new research showing other primates also face high-risk births due to narrow pelvises. A study in Nature Ecology & Evolution reveals infant death rates in some primates exceed 34 percent, disputing previous assumptions. The research corrects flaws in earlier work by Adolph Schultz, who misrepresented fetal head orientation and pelvic measurements in primates.