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Table 1 Epithelial characteristics used to evaluate uterine biopsies using SEM

From: A successful pregnancy following SEM fine tuning of hormonal priming

Epithelial Characteristics Cycle 1 Cycle 2 Cycle 3
Epithelial abundance + +++ +++
Tissue inhomogeneity +++ +++ +
Cell inhomogeneity +++ ++ +
Gland abundance +++ ++ +
Gland opening +++ +++ +
Cilia groups + + +++
Single cilium + ++ +++
Microvilli height ++ + +
Microvilli density +++ + +
Apical membrane defects ++ +++ +
Cell separation +++ +++ +
Denuded apices + +++ +
Flattened cells +++ ++ +
Deflated cells ++ ++ ++
Apical protrusion ++ ++ +++
Uterodome development +++ +++ +++
Uterodome – abundance + + ++
Cell borders ++ ++ +
Crevices ++ ++ +++
Secretion ++ + +++
  1. + = few, barely present, low, small, developing ++ = moderate, average, regressing +++ = abundant, large, wide, fully developed
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