Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2007.673.675A. MohammadpourA.42007104In this project, for measuring and comparing dimensions of ovary and ovarian follicles between Lori-Bakthiari sheep and native goat, eighty ovaries of sheep and goat, aged 1-2 years, from Shahrekord abattoir were collected. After weighing the ovaries, some factors such as: length, width and thickness of left and right ovaries by caliper device were measured. For histological studies, after tissue preparation and staining with H and E, diameter of follicles, thickness of follicular layers (granulosa, theca interna and theca externa) by micrometry methods were measured. By analyzing data with t-test and comparing them between sheep and goat we concluded that, there were significant difference between weight and dimensions of ovaries in sheep and goat. These parameters in goats were larger than sheep. Microscopical studies revealed that, the mean thickness of theca externa of graafian follicle in left ovary of sheep was more than right. The mean diameter of oocyte in secondary follicle of goat in left ovary was more than right. Also in goat, the number of layers of cumulus oophorus around corona radiata was more than sheep.]]>Banks, W.J.,1993Cran, D.G., M.F. Hay and R.M. Moor,1979Draincourt, M.A.,1991Draincourt, M.A., D.R. Gougeon and C. Thibault,1993Evans, A.,2003Lauria, A. and F. Gandolfi,1992McCorkel, R.B., L. MacDougall and G.P. Adams,2004Cervus elaphus) during the anovulatory season.]]>Monniaux, D., C. Huet, N. Besnard, F. Clement and M. Bosc et al.,1997Satosi, K. and U. Motoaki,2004Singh, J. and G.P. Adams,2000