difference between Corpus luteum and Corpus albicans

Corpus Albicans white fibrous tissue that replaces the regressing corpus luteum in the human ovary in the latter half of pregnancy, or soon after ovulation when pregnancy does not supervene.
Corpus albicans - The white fibrous scar tissue in an ovary that results after the involution and regression of the corpus luteum
Corpus luteum    - A yellow, progesterone-secreting mass of cells that forms from an ovarian follicle after the release of a mature egg.

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