A firestorm has erupted among medical researchers after several studies upended the long held belief that prenatal crack exposure was an unmitigated disaster for the unborn. "We used to think that expectant mothers who took crack cocaine were placing their unborn children at risk," says Dr. Scott Fidelman. "However, recent research shows that we were dead wrong. Not only is crack harmless to the unborn, the evidence suggests it might even be a kind of wonder drug."