Respuesta :
The bones and muscles of the pelvis provide support for the growing uterus and baby, and provide a passage through which your baby emerges during birth. ... When the cervix is fully dilated (about ten centimeters), contractions help the baby begin to move from the uterus into the vagina
Answer:
Explanation:
During childbirth, the muscles at the top of your uterus press down on the baby's bottom. Your baby's head then presses on your cervix which, along with the release of the hormone oxytocin see How hormones help you give birth below, brings on contractions.