Figure 3 from Centrality of the umbilical cord insertion in a human placenta influences the placental efficiency. | Semantic Scholar
MCAT Memoranda on Tumblr: So as I understand it, velamentous cord insertion just means the fetal vessels are not protected by the umbilical cord.
Velamentous cord insertion - Wikipedia
Velamentous Cord Insertion
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Velamentous Cord Insertion
Velamentous Insertion of Umbilical Cord - DoveMed
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Velamentous Cord Insertion
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Miami OB GYN, LLC - Typically the umbilical cord is inserted in or near the center of the placenta. However there are some interesting variations that can occur in the placenta. These