http://nashvillecountryproductions.com/News/understanding-a-fetal-doppler-reading/ A fetal doppler is used to locate and hear the heartbeat of an unborn baby. Ultrasound technology is used to detect the baby’s heart beat. An oil or gel is applied to a woman’s belly in order to facilitate the easy movement of the doppler. The doppler will then detect . Fri, 18 Dec 2009 10:36:50 CST en