(Aeon) – When babies are born, they cry in the accent of their mother tongue: how does language begin in the womb?

Vagitus uterinus occurs – always in the last trimester – when there’s a tear in the uterine membrane. The tear lets air into the uterine cavity, thus enabling the fetus to vocalise. Vagitus uterinus provided scientists with some of the earliest insights into the fetus’s vocal apparatus, showing that the body parts and neural systems involved in the act of crying are fully functional before birth.

Loud, shrill and penetrating – a baby’s cry is its first act of communication. A simple adaptation that makes it less likely that the baby’s needs will be overlooked. And babies aren’t just crying for attention. While crying, they are practising the melodies of speech. In fact, newborns cry in the accent of their mother tongue. They make vowel-like sounds, growl and squeal – these are protophones, sounds that eventually turn into speech. (Read More)