Providing families with information about infant sleep can positively impact parents' well-being and infants' sleep habits. Few parents receive professionally based information about sleep, perhaps due to contradictory information found in the literature. This review summarizes: (1) normative sleep patterns for infants; (2) factors that affect sleep patterns; and (3) the effectiveness of intervention and prevention approaches commonly implemented. This information will be useful for practitioners working with new parents and families with questions about infant sleep.