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corpus luteum

cor·pus lu·te·um

/ˌkôrpəs ˈlo͞otēəm/

Noun

A small mass of endocrine tissue that develops from the follicle after ovulation has occurred. It functions as a temporary endocrine gland, secreting progesterone and estrogen, which help prepare the uterus for possible implantation of the fertilized egg. It remains active for several months if implanation occurs or begins to degenerate after about 10 days if implantation does not occur.