Fetal Development By Week: 10 Weeks Pregnant

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iVillage Staff on Mar 18, 2010 at 11:50PM

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Fetal Development By Week: 10 Weeks Pregnant

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Fetal Development Week 10: See Your Baby Grow

The heart is almost completely developed by week 10, and closely resembles the heart of a newborn. The only exception is an opening in the atrium of the heart and a bypass valve, which divert blood away from the lungs (which are not fully formed yet) and oxygenate blood through the placenta instead.

Get more information on being 10 weeks pregnant.

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