“…A national survey of nurse-midwives, certified professional midwives, family practice physicians, and obstetricians found that routine care during the third stage of labor included more than 100 identified practices. 25,26 These practice differences spanned environmental, maternal, medical or pharmacologic, and other components of care. In addition, it is unclear what effect lighting, noise (including phone or pagers), number of people present, or other birthing environmental variables have on physiologic completion of the third stage of labor.…”