As of now, there are no reliable studies of planned unassisted home births. However, in the past several years I have received dozens of stories from women and couples who have successfully given birth without medical assistance. Their stories speak for themselves. Some babies die. It's simply nature's way.
Home birth is legal in every state.
In Colorado, where I live, it is illegal for an unlicensed attendant to deliver a baby. However, you cannot be considered your own attendant, so it is not illegal to deliver your own baby. Still, some women and couples choose to keep their birth plans to themselves when planning an unassisted birth. Unfortunately, society as a whole is not supportive of unassisted birth. If a woman genuinely feels something is going wrong with her labor, she should seek medical help.