A baby in the womb hears many sounds from the outside world, but one type of noise that gets a lot of attention from moms-to-be is music. While the jury is still out on the true impact of prenatal exposure to Mozart and Bach, preliminary research appears to indicate that the unborn child might enjoy and benefit slightly from a daily dose of music. This article attempts to review the effect of music on prenatal babies, the published studies on the theoretical effect and its application in pregnant women.