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===Microscopic=== | ===Microscopic=== | ||
Features:<ref | Features:<ref>URL: [http://library.med.utah.edu/WebPath/PLACHTML/PLAC006.html http://library.med.utah.edu/WebPath/PLACHTML/PLAC006.html]. Accessed on: 30 October 2013.</ref> | ||
*No chorion in the T-zone - '''key feature'''. | *No chorion in the T-zone - '''key feature'''. | ||
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