The placenta is what develops during pregnancy that connects the mother to the fetus. The placenta provides the baby with oxygen, nutrients, and blood. It also delivers the waste of the fetus to the mother so the mother can expel it.
You probably need to re-word this question. Do you mean if the placenta is over the cervix? If the placenta is over the cervix, then you will have to have a C-section. If that does not answer your...
The placenta is an organ that connects the developing fetus to the uterine wall to allow nutrient uptake, waste elimination and gas exchange via the mother's blood supply. (Wikipedia) For the source...