The effect of prenatal exposure to music on fetal movements and fetal heart rate: a pilot study.

OBJECTIVE

To assess and compare fetal cardiac parameters of fetuses listening to music before and during nonstress test, only during the test or never.

STUDY DESIGN

Thirty healthy mother-fetus dyads were randomized in a 1:1:1 ratio to one of three groups: group A in which fetuses were submitted to (33rd + 0 to 36th + 3 week) and during 4 nonstress tests, group B in which fetuses were submitted to during 4 nonstress tests, and group C receiving 4 nonstress tests without any listening. We assessed mean fetal heart rate, fetal heart rate accelerations, fetal heart rate decelerations, fetal movements and uterine contractility.

RESULTS

Fetuses of the group A, who had already listened to a particular piece of music during previous sessions, had significantly increased their heart rate accelerations and movements during the music listening session of the last nonstress test. No significant changes were observed in the number of uterine contractions.

CONCLUSIONS

Our findings show that fetuses slightly respond to that music they know, but they do not significantly respond to unknown music.