I've heard that this one is generally a scare tactic used by Obs to coerce people into caesarians... not sure of the truth in *that*, BUT I do know that a woman's pelvis is designed to pull apart and stretch right out during labour. No doctor can really predict a woman's ability to stretch until she is right there doing it!

My midwife told me of a tiny woman, a size six, who looked barely pregnant. She was giving birth and the baby just kept coming, and coming, and coming - it was a whopper! 11 pounds all up. Both mother and baby were a-ok. I love hearing stories like that!