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The most peripheral contact area

TEM of a stage 4 embryo in vitro showing the most peripheral contact area between two trophoblast cells (T) and cultured endometrial cells (E). Measuring bar = 2 µm. One trophoblast cell adheres to the endometrial epithelial cell (arrow). Another trophoblast cell has started epithelial penetration (arrowhead).

From: Bentin-Ley et al., 2000. Reproduced with permission of the Society for Reproduction and Fertility.

Keywords: endometrial cells, epithelial penetration, peripheral contact area, stage 4 embryo, trophoblast cells

Source: The Virtual Human Embryo.