Q: I don’t remember any material discussing the development of the baby’s heart from 20 weeks. When did that happen? Is it completely developed before 20 weeks, and does it continue to grow?
A: Your baby’s heart begins developing in the first trimester and is nearly fully developed by 20 weeks. It has 4 chambers, functioning valves, and its beats can be heard with a stethoscope. It continues to grow with your baby.
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