Ovaries on Day 16 of the Estrous Cycle.

Ovaries on Day 16 of the Estrous Cycle.
The left ovary shows a fully developed corpus luteum, the right ovary shows a large dominant follicle. Legend: 1 = corpus luteum with a cavity (lacuna), 4 = corpus albicans, 5 = stroma.

Pieterse MC (1999)