there is something with the uterus haveing enought oxytocin receptors. i think there is something with the L/S ratio and something being released by the fetus that triggers these receptors. Of course, the size of the uterus plays a factor at term(ie. triplets....more babies...stretch the uterus to a term uterus sooner)
What about Breastfeeding. There is so much that pt's do not know about. or if you have to be more specific how about mastitis ....how to prevent what to look for...etc good luck Hope