Why not in a hospital?
The United States ranks among the highest for use of drugs and other non-emergency related medical interventions during labor and delivery.
Caesarean Rate
Rates soar as high as 25 percent of women in hospitals (The World Health Organization suggests not more than 11 percent as a standard)
Alarming data suggests many newborns are introduced to viral and bacterial infections by being born in a hospital's disease filled environment.
Medical Staff
Most women do not deliver with their own doctor.  Rather, they work with whatever physician is on call.  Several changes of staff can occur during the course of labor and delivery.
Source: cfmidwifery.org