Dominant Follicle and CL.
Left ovary: dominant follicle and a co-dominant follicle which will undergo atresia. Right ovary: corpus luteum and a small follicle. About day 15 of the estrous cycle at the time of follicular deviation when the dominant follicle is selected (diameter 7.2 to 7.5 mm).
Zambrano-Varon J (2012)