Umbilical cord - Wikipedia
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Nuchal cord - Wikipedia
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File:Cross section of human umbilical cord immediately after cutting.jpg - Wikimedia Commons
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Ep 209: The Umbilical Cord -What Is It, What Does It Do And, 47% OFF
Ep 209: The Umbilical Cord -What Is It, What Does It Do And, 47% OFF
What is the umbilical cord attached to?
Single umbilical artery - Wikiwand