Figure 22.Diagram of the cellular mechanisms by which the preovulatory surge of FSH and LH causes ovulation. (Erickson GF: The Ovary: Basic Principles and Concepts: In Felig P, Baxter JD, Broadus AE, Froman LA, (eds): Endocrinology and Metabolism, 3rd edition. New York, McGraw Hill, 1995)