What do babies hear in utero?

Research shows that babies may be able to hear sounds in the womb as early as the 18th week of pregnancy, when the ears first start to stand out from the head. But what do they hear? And do babies understand or remember anything they heard in the womb after birth? A study published recently in the Proceedings of the National Academy of Sciences takes an important step toward answering those questions. © TWN (Bundoo)