According to James McKenna, PhD,  During the last decade, we've seen a tremendous decrease in the numbers of Sudden Infant Death Syndromes per 1000 live babies born. What are the main risk factors for SIDS?  One, lack of breastfeeding is an important risk factor for SIDS. Two, we have turned babies away from stomach sleeping and put them on their backs. That proved to be singularly the most significant risk factor for Sudden death syndrome. Third factor is proximity of mother, room sharing, as a form of co-sleeping