I did a little research and found ketosis tends to increase the time in deep sleep in exchange for REM sleep. (marksdailyapple.com)
This video instructions shows you the steps on how to put a sleeping baby down on the bed after they have fallen into deep sleep in a baby ring sling. (babyslingsandcarriers.com)
This is because our brains try to make up for lost sleep by increasing the amount of deep sleep during the night. (childrenshospital.org)