Uterus - histology slide

This is a histology slide of endometrium. Except for the menstrual phase the cavity of the nonpregnant uterus is lined by a single layer of columnar epithelium. The endometrium varies with the menstrual cycle. In the secretory (luteal) phase (l5th-28th days) the glands are more abundant than earlier. During the early secretory phasethere are subnuclear vacuoles which are evidence of ovulation. The glands become tortuous and saw-
toothed. Some contain secretory material. The stroma is sparse and loose.

Histology image descriptions and photography by Frank N. Miller, M.D.; histology image courtesy of Uniformed Services University of the Health Sciences.