Fetal hearing
So can a baby really hear in the womb?
There is evidence to suggest that from 18 weeks gestation, the auditory system starts developing until 5-6 months of age. An embryo’s ears start developing during the 2nd month of the pregnancy, initially as flaps of skin folds, that start to stick out from 18/40.
Between 22 to 24 weeks, the baby will start to hear low frequency noises from outside the womb and may start to respond. It may move in response or have an increase in its heart rate. It will already be able to hear noises from inside your body, such as your tummy gurgling and your breathing and heart beating.
There is uncertainty as to what noise levels are safe, but the National Institute for Occupational Safety and Health recommend pregnant women avoid loud situations as much as possible.
It is recommended that speech and music is needed to enable the auditory system to develop. Whilst the baby is exposed to noises within the womb, it can start to hear noises from outside the womb from 23/40. Sound travels best through air but will also travel through fluid (the amniotic fluid) but will be more distorted and muffled. You baby will be able to hear your voice as a sound. It is important to talk to your baby whilst it is inside your womb as it will recognise your voices. It will also allow you to bond with your baby whilst in the womb. Some parents will read to their baby inside the womb and whilst there is no evidence that it will improve their IQ, it will stimulate their auditory processes. Playing music or singing to your baby is also recommended but advised not loud music
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