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How does the corpus luteum produce progesterone?

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Front view anatomical diagrams of the male and female reproductive systems, with labeled organs including penis, testis, prostate gland, uterus, ovary, and vagina. — human reproductive system Organs and structures of the male and female reproductive systems.

The corpus luteum produces progesterone by functioning as an endocrine gland within the ovary.12

Following ovulation, luteinizing hormone (LH) triggers the transformation of the ruptured graafian follicle into the corpus luteum. This structure is composed of lutein cells, which develop as yellow pigment and lipids accumulate within the granulosa cells that previously lined the follicle. These specialized cells then secrete progesterone, which prepares the uterus for the implantation of a fertilized ovum.21