Figure 1.

(a) Equine endometrial biopsy. Bar = 0,5 cm; (b) histologically, the endometrial biopsy sample is composed of the luminal epithelium (LE) and the lamina propria mucosa with the superficial stratum compactum (SC) and the deeper stratum spongiosum (SP). The stratum compactum has a dense stroma (asterisk) and contains the glandular ducts (black arrowhead). The stratum spongiosum has a loosely arranged stroma (hash keys) that surrounds the secretory portions of the endometrial glands (white arrowheads). Bar = 200 µm; Staining with hematoxylin-eosin.