I have heard quite often that it is good to play music for an unborn baby. I have also heard it makes the baby smarter. I wondered if this was true, so I did some research, and research showed that music can be good for the baby, but it does not necessarily make it smarter. What it can do, though, is calm and relax the mother, which in turn, does the same for her baby. As the fetus grows inside the mother’s tummy, it can hear sounds. So listening to music can have a positive effect. When choosing music for baby to listen to, it is best to choose music with a soothing harmony. Rap, heavy metal and some rock music tends to be loud and alarming. Music in these genres may startle baby.