G. Examine the ovaries on your reproductive tract. The outer surface of the ovary is the germinal epithelium. Locate and identify any corpora lutea (singular = corpus luteum) and tertiary follicles. The function of the follicles are to produce oocytes and estrogens. The function of the corpus luteum is the production of progestins. The ovary in the cow is considered to have an almond shape. Note that the follicles and corpora lutea while in the outer layer of the ovary appear more buried than you will observe in the sow.

Cut open a corpus luteum on one of the ovaries. Note how much of the corpus luteum is below the surface of the ovary.

Now look for a small white spots on the surface of the ovaries that are not tertiary follicle. These are likely to be corpus albicantia (white body, singular = corpus albicans) that is actually regressing corpora lutea. This can be verified by cutting into one of the structure with a scapel to demonstrate it is not a corpus luteum.