Is the placental disk really an ellipse?

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• 作者：M. Yampolsky^a ; C.M. Salafia^b ; ^{carolyn.salafia@gmail.com} ; ^{salafiacm@aol.com} ; D.P. Misra^c ; O. Shlakhter^d ; J.S. Gill^e
• 关键词：Placental shape ; Chorionic surface ; Birthweight ; Placental weight
• 刊名：Placenta
• 出版年：2013
• 出版时间：April, 2013
• 年：2013
• 卷：34
• 期：4
• 页码：391-393
• 全文大小：363 K

文摘

The mean surface shape of placenta is round and common abnormalities of shape are associated with vascular abnormalities and reduced placental functional efficiency. A long-standing approach is to describe shapes as elliptic, and to quantify them by ¡°length¡± and ¡°breadth¡±. We test this description in two cohorts: National Collaborative Perinatal Project and Pregnancy, Infection and Nutrition Study. We conclude that quantifying placental shape as elliptic is ambiguous and problematic. The ¡°breadth¡± of the placenta should be interpreted as a combination of two different measurements: placental size and irregularity of the placental surface. It has no intrinsic functional significance.