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A: Your baby's heartbeat is one of the first things your doctor will look for on an ultrasound, a test that uses sound waves to give off visual images of your baby and placenta as well as your uterus and other pelvic organs.
Additionally, a traditional stethoscope can be placed on the mother's belly to listen to the baby's heartbeat. The Timeline. Each of these techniques reveal the baby's heartbeat at different times: Vaginal ultrasound-- A vaginal ultrasound can show the baby's fluttering heart onscreen and play a simulated recording of the heartbeat as early as 5 to 6 weeks gestation. Abdominal ultrasound-- An abdominal ultrasound can pick up the baby's heartbeat during weeks 7 and 8. Doppler-- A Doppler can detect the heartbeat at the end of the first trimester and beginning of the second trimester, around 12 to 14 weeks. Stethoscope-- Health care providers can use a stethoscope to detect the baby's heartbeat starting at week 22. Factors Influencing Hearing Heartbeat. In some situations, hearing the baby's heartbeat may be challenging.