Some "monotonous sounds" like a vacuum cleaner ... or eat junk food or maybe even enjoy an adult beverage, once a baby goes to sleep you'll do just about anything to keep them from waking up ...

But what really is so important about sleep for infants ... believe it or not, before the baby is born, the sound is louder than a vacuum cleaner 24/7, rah, rah, rah, rah kind of a sound.

Remember the sound inside the womb is as loud as a vacuum. Babies only need swaddling ... all night long can add an extra hour to your baby's sleep. Harvey Karp, MD (cont.) The 4th S is Swinging ...