There has been ongoing debate over whether co-sleeping is beneficial or detrimental to the development of infants. But studies have shown that sleeping with the parent influences the emotional development of both the parent and the infant. By sleeping with the parent, the warmth of their body in addition to the feeling of protection allows an attachment between the two. The infant is also able to follow the breathing rhythm of its parent while sleeping together. Infants' exposure to toxins in their parents' breath also contributes to their development. Additionally, co-sleeping has been observed to have prolonged effects on social interactions between parent and child. The purpose of this article is to examine the extent to which co-sleeping is beneficial for infant development. One of the problems most parents of newborns face is how much sleep their infant gets and when they sleep, whether it's day or night. An important goal for parents is to eliminate the stress of their infant's nighttime waking by enabling them to develop early, healthy, independent sleep habits. This is the goal of most parents, especially in Western countries like the United States, which is why many are against co-sleeping. Sleeping through the night or settling down is a misleading concept. Most adults and children wake up periodically during the night and go back to sleep without being aware of it, something infants may not realize immediately. Parents of newborns can't expect their baby to get eight hours of uninterrupted sleep, especially alone in a room, but they can expect gradual improvement. Wolfson, Lacks, and Futterman (1992) study the effects of parent training on infant sleep patterns, parental stress, and perceived parenting competence... middle of article......no, otherwise more importantly, than bedtime practices in predicting infant sleep quality (Teti et al., 2010). The results support the theoretical premise that parents' emotional availability to children in a sleep context promotes a sense of safety and security and, therefore, better regulated child sleep. In conclusion, although none of the above directly indicates how co-sleeping affects emotional development. In infants, it is clear that infant sleep is essential for overall infant development. During the times when infants sleep with their parents, they benefit from great parental availability which will soothe them. In turn, this improves parent-child attachment, which will affect how infants express their emotions. Being able to freely express their emotions and having a receptive parent will be beneficial to their emotional development..