Then and Now: Childbirth and Pelvis Size
Most people understand the physical changes our species have accomplished throughout evolution. Many of these changes have not been precisely pinpointed on the timeline of our development.
The pelvic outlet in modern humans is thirty percent smaller than in our ancient ancestors, making for the belief childbirth is more painful today.
The big news today is that there has been a new finding of female pelvis, dated 1.2 million years ago, contrasting ‘Lucy’ who was dated at 3.2 million years old.
Scientists speculate that there was no need for assistance in birth before the evolutionary change of brain size. Now pelvic narrowing seems to have arrived later in the evolutionary past than previously thought.
The significance of that finding is there must be another cause of our developing a more lean physique. Scientists now want to figure out what the cause and time period of that change was.
In addition, for women, the hope remains that natural selection is done with that area of the body, or that babies heads do not grow larger, as issues with childbirth could have tragic consequences under those circumstances.
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Filed Under: Daily News
