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Throughout a woman’s pregnancy, her baby undergoes many stages of development before birth. Among the milestones that indicate life is the heartbeat. But when does a fetus have a heartbeat?

What to Know about Fetal Heartbeat Development

Through the use of ultrasounds, modern science can detect the waves of the baby’s heartbeat as early as three weeks after fertilization. Although the child’s organs have not yet fully formed, soon after this three-week mark the heart beats about 110 times per minute.

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And read more about embryonic heartbeats here.