Prior to ovulation, development of granules in the follicles is dependent on:-

Initial phase of follicular development before entering the menstrual cycle i.e from primordial to Antral follicle is independent of gonadotropins Early follicular phase is FSH dependent Late follicular phase is LH & FSH (both) Development of coical granules in the follicle, is dependent on LH, hence LH is required for its final maturation, prior to ovulation