Source of progesterone during normal menstrual cycle

Progesterone is a steroid sex hormone that is the principal progestational agent; it plays a major pa in the menstrual cycle. During the maturation of the secondary oocyte (ovum), estrogen, the principal female sex hormone, is produced at a high rate. At ovulation estrogen production is sharply reduced, and the ovary then creates within itself a special endocrine structure called the corpus luteum whose sole function is to produce progesterone.Ref: Ganong&;s review of medical physiology; 24th edition; page no:-401