Women all over the world give birth by Cesarean section far more often. Human evolution is being shaped by the number of women giving birth by C-section these days. C-sections have become more common, they might also be altering the course of human evolution.
The increased use of C-sections means all that is changing because women with hips of any size can now give birth to babies of any size.
Researchers have developed a new theory: Evolution favored small female pelvises and large newborns for good reasons. And, the researchers said, the rise of cesarean sections — the surgical delivery of a baby — in recent decades may be contributing to an even bigger gap between the size of newborns and their mothers’ pelvises. In fact, the researchers estimate that the regular use of C-sections has led to a 10 to 20 percent increase in the gap between female pelvis width and babies’ size.
Does this mean the rise in C-sections could be changing human evolution?