I have found mant pros and cons. This is the reason why I chose to cosleep (read below). I am sure their is some other research that contradicts this.
My child was in NICU and based on what this says along with other research, I choose to co sleep. My son stopped breathing twice in his sleep and I had to nudge him awake. Perhaps it was just a really long breath hold while he was sleeping??? I am still glad I was next to him. I know they have those angel monitors as well. I am HUGE into attachment parenting.
I do believe there are certain things you must do before you decide to cosleep. We have a king size bed. We still don't sleep with pillows. The bed is against the wall so there is no gap. Our blanket only goes to our waists while brian is at the top of the bed. My husband and i seriously don't move in our aleep, ever,
We are careful BUT it is now getting to be a safety issues because Brian can crawl out of bed, The transition is going to stink!! Nathan never coslept but he also didn't have the issues either.
I really wish that I purchased the cosleeper that attaches to the bed. That does seem a little safer.
I am on another forum where most of the woman cosleep. One lady rolled over on her baby when she was asleep and her baby died at two months. It could happen. We strongly believed in cosleeping due to Brian's issues when he was born and really did our best to make it safe.
Here is the information. I don't know who did the study, sorry.
Stable physiology
Studies show that infants who sleep near to parents have more stable temperatures 2, regular heart rhythms, and fewer long pauses in breathing compared to babies who sleep alone 3. This means baby sleeps physiologically safer.
Decreases risk of Sudden Infant Death Syndrome
Worldwide research shows that the SIDS rate is lowest (and even unheard of) in countries where co-sleeping is the norm, rather than the exception 4, 5, 6, 7, 8, 9. Babies who sleep either in or next to their parents’ bed have a fourfold decrease in the chance of SIDS 10. Co-sleeping babies actually spend more time sleeping on their back or side 1 which decreases the risk of SIDS. Further research shows that the carbon dioxide exhaled by a parent actually works to stimulate baby’s breathing 11.