KW: If you've been able to help them differentiate day vs. night in the first three to four months, oftentimes we start to see a glimmer of a "schedule" with our babies under six months. What's happening in that sleep development is that babies produce and secrete melatonin, which is the drowsy-making hormone and also the hormone that regulates our internal clock. Often moms will start to say to me, "Oh yeah, I noticed my baby's starting to wake up at 7, 7:30 in the morning, and they tend to have a nap in an hour, hour and a half later . . . " and so then that ends up driving your day — watching those sleep windows. By the end of the afternoon or oftentimes, especially if you have older children, you end up being out and about, and then our babies maybe nap in the stroller or the car — you just catch it when you can. It's not ideal, but I think it often happens, and since that sleep is the last to develop, I am supportive of parents using motion sleep if that's the only way they can get the baby to nap.
