The purpose of the study is to examine the co-sleeping practices and attitudes of 94 mothers immediately postpartum, and at 1 and 3 months postpartum. Maternal motivations for infant sleep choice, maternal attitudes towards infant sleeping practices and environmental factors contributing to infant sleep practice were also be studied. Co-sleeping has been suggested in the literature to put an infant at risk for Sudden Infant Death Syndrome (SIDS) due to the risks of overlaying or the risk of entrapment, wedging, falling or strangulation (Meisich, 2005). The study was a descriptive design using a self-reported instrument immediately after delivery and follow-up phone interviews at 1 and 3 months postpartum. Ninety-four women completed the questionnaire immediately after discharge, 70 of these women were interviewed at 1 month postpartum, and 54 of these women were interviewed at 3 months postpartum. Attrition rates were due to changed phone numbers and unreturned phone calls. The majority of the women was between the ages of 22 and 40, had a high school education, and employed full-time. Approximately half of the women were married. Sixty-one percent of the women were white and 30% black. While no mothers intended to co-sleep with their infants immediately after delivery, 60% of the mothers reported co-sleeping at some time at 1 month postpartum and 9% reported co-sleeping at 3 months postpartum. Common reasons reported for co-sleeping included infant fussiness and convenience for feeding. There were no differences in co-sleeping rates between breastfeeding and bottle-feeding mothers. This finding indicates that the one month postpartum period is the time of greatest risk for infant co-sleeping. Almost all of the mothers reported that they felt that co-sleeping was an unsafe practice. One mother reported using a co-sleeper bed. Only 19% of mothers reported receiving information about infant sleeping from their physician and 22% reported receiving information from their nurse. Twenty-two percent reported receiving information from a friend and 27% from a relative. This suggests that healthcare providers are not including this information in their childbirth education. Limitations of this study included the attrition rate of the sample, particularly at the 3 moth data collection point and issues associated with changes in data collection personnel related to institutional staffing changes. The strength of the study is the capture of infant co-sleeping practices over time. Implications for the results of this study include the identification of the 1 month time period as high risk for infant co-sleeping. This was often due to infant fussiness. Interventions aimed at teaching new mothers about responding to infant cues and ways to manage a fussy infant may minimize the rate of co-sleeping. For those mothers co-sleeping for feeding reasons, information about safe co-sleeping practices is essential. It is concerning that very few women received information about infant sleeping from their physician or nurse. This information must be incorporated in childbirth education and discharge teaching.