1. Weibel ER: Practical methods for biological morphometry. In: Stereological Methods, Vol 1, London: Academic Press, 1979.
2. Enders AC, Lyons WR: Observations of the fine structure of lutein cells. II. The effects of hypophysectomy and mammotrophic hormone in the rat. J Cell Biol 22: 127–141, 1964.
3. Long J A: Corpus luteum of pregnancy in the rat — ultrastructural and cytochemical observations. Biol Re-prod 8: 87–99, 1973.
4. Anderson E, Little B: The ontogeny of the rat granulosa cell. In: Toft DO, Ryan RJ (eds), Proceedings of the Fifth Ovarian Workshop, Ovarian Workshops, Champaign, IL: pp. 203–225, 1985.
5. McClellan MC, Diekman MA, Abel JH, Niswender GD: Luteinizing hormone, progesterone and the morphological development of normal and superovulated corpora lutea in sheep. Cell Tissue Res 164: 291–307, 1975.