OBJECTIVE:The purpose of this article was to examine the similarities and differences in ovarian morphology and function that are known to exist among mammalian species. The previous difficulties and present solutions to the characterization of ovarian function in non-domestic or non-laboratory species are discussed.
METHODS:The current literature regarding comparative ovarian structure and function was reviewed to identify examples of the diversity found within mammals.
RESULTS:Major differences in ovarian anatomy include location in the body cavity; the degree of membranous covering surrounding the ovary; vascularization of the ovary, oviduct, and uterus; and the organization of different cell types within the ovary. The differences in ovarian function are simplified in this review by categorizing the known examples into six groups according to patterns in follicle growth and development, mechanisms of ovulation, response of steroid target cells, and luteal function.
CONCLUSIONS: Each mammalian species has a unique expression of its ovarian function. The differences between species range from quantitative differences in ovarian cycle phase length to qualitative differences in cell type, endocrine activity, and mechanism of ovulation. These differ ences present a special problem to research scientists when they attempt to select models for studying many aspects of female reproduction. (J Soc Gynecol Invest 1994;1:247-55)
Johnson M., Everitt B.Essential reproduction. 3rd ed. Boston: Blackwell Scientific Publications , 1988.
2.
Pow Cst, Martin L.The ovarian-uterine vasculature in relation to unilateral endometrial growth in flying foxes. J Reprod Fertil101(2):247-58.
3.
Mossman, HW, Dukes KLComparative morphology of the mammalian ovary. University of Wisconsin Press, Madison, WI, 1973.
4.
Benirschke K. , Low RJ, Byrd M.Further observations on the causes of death . In: The Chacoan peccary, Catagonus wagneri. No. 1. International Symposium on Diseases of Zoo- and Wild Animals, Dortmund. Berlin : Akademie Verlag, 1989:71-8.
5.
Lasley BL, Kirkpatrick JFMonitoring ovarian function in captive and free-ranging wildlife by means of urinary and fecal steroids. J Zoo Wildlife Med1991;22:23-31.
6.
Loskutoff NM , Ott JE, Lasley BLStrategies for assessing ovarian function in exotic species. J Zoo Wildlife Med1981 ; 14:3-12.
7.
Shideler SE, Savage A., Ortuna A., Moorman EA, Lasley BLMonitoring female reproductive function by measurement of fecal estrogen and progesterone metabolites in white faced saki. Am J Primatol1994;23:95-108.
8.
Kassam Aah, Lasley BL, Stabenfeldt GHEstrogen excretion patterns in the Indian rhinoceros from simplified urinary analysis. Am J Vet Med1981;42:265-70.
9.
Walker LA, Cornell L., Dahl KD, et al. Urinary concentrations of ovarian steroid hormone metabolites and bioactive follicle stimulating hormone in killer whales during ovarian cycles and pregnancy. Biol Reprod1988;39:1013-20.
10.
Czekala NM, Shideler SE, Lasley BLComparisons of female reproductive hormone patterns of hominoids. In: Schwartz JH, ed. Aspects of the biology of the orangutan. Oxford University Press, Oxford1986:177-22.
