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The document discusses the anatomy and structure of the placenta, including its diameter, thickness, weight, and proportional weight between the placenta and fetus at different stages of pregnancy. It also covers the attachment of the umbilical cord, including its shape, distribution of vessels, site of attachment, degree of adhesion, and tissues forming the placental barrier. Finally, it mentions abnormal penetration of the uterine wall can result in conditions like placenta accreta, placenta incerta, and placenta percreta.
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