Makes TOTAL sense. Just like it takes longer for milk to let down in C-Section women (unless allowed to go into labor),the hormone wouldn’t be released in childbirth.
Oxytocin is a potent stimulator of contractions, which help to dilate the cervix, move the baby down and out of her body, give birth to her placenta, and limit bleeding at the site of the placenta. During labor and birth, the pressure of the baby against the cervix and then against tissues in the pelvic floor stimulates oxytocin and contractions. So does a suckling newborn.