1. Frangenheim H: Movie of human ovulation. Presentedat the First American Association of Gynecologic Laparoscopist’s Symposium, Las Vegas, November 14, 1972
2. Kistner RW: Personal communication: "… the late Dr. Mike Leventhal who felt that some patients with polycystic ovarian syndrome did not really ovulate subsequent to the administration of Clomid. Mike felt that a good number of the follicles were brought almost to maturation by the administration of the Clomid and that perhaps one, or more, of these follicles would rupture beneath the cortex of the ovary and thus produce either luteinized follicles, or a corpus luteum, without release of the ovum from the ovary. He, thus, used the term 'entrapped ovum' and, if I have used it somewhere or you have seen it, which undoubtedly you have, that is the source.".
3. Role of the ovum in follicular luteinization;El-Fouly;Endocrinology,1970
4. Management of infertility resulting from ovulation;Jewelewicz;Am J Obstet Gynecol,1975