Yes I don't get what u mean either water bag?
What do you mean not in the water bag? Your baby is in the sac with amniotic fluid the whole pregnancy until you go into labor and your placenta is never the first out it is the last if it is lower than the baby covering your cervix you have a c section instead of vaginal birth
They wouldn't let your placenta come out first, if your placenta is covering you cervix then you will have a c section.