You might have noticed that your baby becomes more active when you're listening to music. It's been noted that unborn babies move and even breathe in time to music, and there have been claims that by exposing your baby to certain types of music, you can enhance her brain development.
One study, relating to a "Baby Mozart" brain-enhancing product, claimed that the structure of, say, a particular Mozart arrangement, stimulated brain development to a greater extent than other genres, and even other classical composers. This theory has, however, been debunked. Some research found that college-aged students who listened to classical music showed a brief and temporary improvement in spatial intelligence. However, the same research was not tested in children or babies.
The research has not been repeated and the results are open to several different interpretations.
Whether or not it enhances your baby's intelligence, listening to classical music can relax you, which is always a good thing during pregnancy. And if you gently sway to the music, your baby may enjoy being "rocked" to sleep.