Abstract: The present study is a retrospective review and coding of the videotapes of 49 fetuses at different gestational age. The purpose of this study was to examine changes in fetal breathing movement over gestational age in response to airborne sound stimulation. The result showed that the changes in fetal breathing and body movements were modulated by sensory stimulation. And there were differences in changes of breathing and body movement between fetuses in different gestational age. That is, fetuses from 35 weeks to term were more sensitive to response to the airborne stimulation than fetuses from 32 weeks to 34 weeks.

Key words: fetuses, fetal breathing, fetal movement airborned sound