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Uterus in early secretory phase

Microimage
Endometrium and myometrium. Image copyright: University of Oslo, CC BY-NC-ND 4.0. (Tissue stain: H+E).

This shows the endometrium (and the myometrium) in the early secretory phase. The endometrium is now 5-6 mm thick. It is somewhat thicker in vivo because the tissue shrinks about 10% during preparation of the section.