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The Endowment for Human Development
The Endowment for Human Development
Improving lifelong health one pregnancy at a time.
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Close-up, Seven-Week Heart

6 weeks, 6 days

Close-up, Seven-Week Heart [Click for next image]
From The Biology of Prenatal Development.Buy Now

Note:

The average heart rate peaks around seven weeks after fertilization.

Label Key:

1. heart
2. liver
All ages referenced to fertilization, not last menstrual period.
The Heart and Brain
The Heart and Brain
Left Hand and Left Eye
Left Hand and Left Eye
Close-up, Seven-Week Heart
Close-up, Seven-Week Heart
The Four-Chambered Heart
The Four-Chambered Heart
The Heart
The Heart
The Heart and Chest
The Heart and Chest
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