*LH causes a shift from oestrogen to progesterone production by follicular Granulosa cells. This local increase in progesterone stimulates Theca cells to produce the enzyme Collagenase, which breakdown the collagen within the [[Female Reproductive Tract -The Ovary - Anatomy & Physiology|Tunica Albuginea]] weakening the follicle wall. | *LH causes a shift from oestrogen to progesterone production by follicular Granulosa cells. This local increase in progesterone stimulates Theca cells to produce the enzyme Collagenase, which breakdown the collagen within the [[Female Reproductive Tract -The Ovary - Anatomy & Physiology|Tunica Albuginea]] weakening the follicle wall. |