How it was designed ...By placing a specially designed 8mm microphone inside a pregnant mothers uterus, directly next to the unborn infants ear. Insertion of the microphone moments before the mother went into labor enabled Dr. Eller to record the major intrauterine sounds that the baby had been hearing for the last four to five months prior to birth. The recorded sounds were then clinically tested on thousands of babies in hospital nurseries, and proved to be a natural audio baby pacifier. Based on the knowledge that the birth experience and transition from the peaceful, quiet existence inside the mothers body is a very traumatic time for the newborn, it has been proved that the recorded intrauterine sounds produce a calming effect on the newborn infant after birth. Now with more Sounds Including, Lullabies, Ocean waves, White noise and a Recording Function which helps bonding with baby.