PMC3699156_01
The dividing membrane is shown. The septum consists of two layers of amnion, with the absence of chorion. Hematoxylin and eosin stain, x 400.
ajpr03033-1.jpg
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FI03033-1
Pathology of the placenta showed that the septum consisted of two layers of amnion but lacked layers of chorion (Fig. 1).