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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.
It can show if your baby is getting enough oxygen. The ultrasound can show the heart but you won't be able to hear it. You are in the phase of pregnancy when the fetal heart beats can be heard for the first time. The doctor will use the Doppler instrument to detect the heart beats.