When you've been given an epidural, you are generally required to be in a bed. (This doesn't answer your question, but I think it is relevant.)

My wife works at a leading private maternity hospital in India. I can’t yet report from personal experience, but my wife says that epidurals are normal procedure, and per the hospital’s published statistics, about 90% choosing to give birth propped up or squatting (this figure excludes C-sections, water births, and complicated cases), which implies not being in a bed for at least the last part.