A failure to deliver

If only we could give birth like the monkey mum. She squats on her hind legs, and as her baby is born, his head facing hers, she reaches down to guide him into the world. Once her infant’s arms are free, he is strong enough to grab her body and pull himself out. Despite his head being almost the same size as the diameter of his mother’s birth canal, that canal is the same oval shape from entrance to exit, giving the baby monkey a smooth and unobstructed path to life. Consider, though, the task facing the human baby, who must twist and turn like an Olympic bobsledder down a birth canal whose dimensions change from top to bottom and side to side