Want to understand your baby from day one? Which can. Priscilla Dunstan, an Australian mother with a photographic memory for sound, has discovered that all children at birth make five sounds with specific meanings. A sound hungry, tired, burp still bothers colic and discomfort which you can think of too hot, too cold, dirty diaper or something else. These "words" are caused by the reflexes of your baby (sucking reflex, yawn reflex) combined with the sound, making it universal to all babies in the first three months of life