Room Sharing, not Bed Sharing
Remember, adult beds, sofas and chairs are not safe for sleeping babies and can greatly increase the risk of SIDS, suffocation and accidental infant deaths.
There have been reports of infants being suffocated by an adult, brother, sister, other family member, or pet, that rolled on top of the infant while sharing a bed or other sleep area such as a couch or chair.
Bring baby into your bed to breastfeed and bond, but when its time for sleep, place your baby in his or her own separate, safe sleep area.
If you have been drinking alcohol, or taking drugs/medicines that may make you sleepy, or are very tired, or are very overweight, do not bring your baby into bed with you.
Reference: First Candle.