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Fetal Heartbeat Starts Days Earlier Than We Thought It Did (VIDEO)
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Building a Baby 2: The Heart - StoryMD
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When Can You Hear Your Baby's Heartbeat? — Motherboard Birth
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Is a 'fetal heartbeat' really a heartbeat at 6 weeks? | Live Science
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Live Action - Did you know? At 21 days, a preborn baby has a heartbeat. At the end of the first trimester, the child has a face, fingers and toes, and a
Beating Heart Animation: How a Normal Heart Works - YouTube
First of our three billion heartbeats is sooner than we thought | University of Oxford
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First heartbeat of babies as early as 16 days after conception - study — RT UK News
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