Corpus luteum is developed from

A human female experiences two major changes, menarche and menopause during her life. Mention the significance of both the events.

The structure formed after release of ova from graafian follicles and secretory in nature, is

Menstrual flow occurs due to lack of

During menstruation the level of progesterone in blood is

Transformation of a young follicle into graafian follicle is controlled by