Fig. 38. Scanning electron micrograph of the protruding surface of an ovulatory follicle(F). Notice the groups of surface epithelial cells in the presumptive stigma (a flower-like bouquet), which are in the process of being sloughed off. (From Motta P, Van Blerkon J: A scanning electron microscopic study of the luteo-follicular complex II events leading to ovulation. Am J Anat 143:241, 1975.)