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Histology of the rhesus endometrium in the proliferative, secretory and menstrual phases. Histological sections of the endometrium were cut on a plane running from the luminal to the myometrial border. Straight versus tortuous glands are evident in (a versus b). Sections taken during the menstrual phase (c–e) show that menstrual breakdown is only evident in the functionalis (c–d) not the basalis (e). Scale bar for a–c = 1 mm; scale bar for d–e = 100 μm
