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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.
Your babyâs heart begins to form approximately three weeks after conception. Starting from the fourth week, your babyâs heartbeat can be detected transvaginally. Starting from 12 th week your doctor can detect a babyâs heart beating via a Doppler device, although many doctors wait longer to use a Doppler, as itâs quite difficult to find a heartbeat at such an early gestation.