The Biology of Newborn Sleep

Posted at 11:11 AM, Apr. 16, 2005

During the early months of your baby's life, he sleeps when he is tired, it’s really that simple. You can do very little to force a new baby to sleep when he doesn’t want to sleep, and conversely, you can do little to wake him up when he is sleeping soundly.

A very important point to understand about newborn babies is that they have very, very tiny tummies. New babies grow rapidly, their diet is liquid, and it digests quickly. Formula digests quickly and breast milk digests even more rapidly. Although it would be nice to lay your little bundle down at a predetermined bedtime and not hear a peep from him until morning, even the most naïve among us know that this is not a realistic goal for a tiny baby. Newborns need to be fed every two to four hours — and sometimes more.

During those early months, your baby will have tremendous growth spurts that affect not only daytime, but also nighttime feeding as well, sometimes pushing that two- to four-hour schedule to a one- to two-hour schedule around the clock.