Ovaries on Day 4 of the Estrous Cycle.

Ovaries on Day 4 of the Estrous Cycle.
The active left ovary shows a corpus hemorrhagicum and a dense corpus albicans. The right ovary shows an emerging dominant follicle. Legend: 1 = follicle, 2 = corpus hemorrhagicum, 4 = corpus albicans / atreticum, 5 = stroma.

Pieterse MC (1999)