At just four and a half months in the womb, they can already hear sound, which is why, from the moment they’re born, babies prefer the sound of their mother’s voice to one they’ve never heard.

The 3rd S is Shushing or a strong, white noise. Remember the sound inside the womb is as loud as a vacuum. Babies only need swaddling and womb noise when they are fussy or when you are trying to ...