Morphological analysis of ovaries of Nelore bovine fetuses (Bos primigenius indicus) at various gestation stages
Keywords:Morphology, Ovaries, Fetuses, Bovine
AbstractIn this research, twenty Nelore female fetuses in different phases of gestation were collected. The right and left ovaries were dissected and measured for verification of the length and width and soon after that, the entire ovaries were fixed in 4.00% tamponed paraformaldeido, processed and enclosed in paraplastic. The histological sections with 5 mm were stained with hematoxilin and eosin, Masson's trichrome (to colagens fibers), Verhoeff (to elastic fibers) and with reticulin (to reticulares fibers). The results showed that there is no significative differences among the right and left sides for the bovine ovaries in fetuses in different phases of gestation, but there is correlation of the ovaries values in function of the age of the fetuses, or either, the growth of the ovaries follow the fetal growth. The fetuses in different phases of gestation, present germinative epithelium, tunica albuginea and connective tissue in the cortical and medullar parts characteristically of ovarian morphology. In the ovaries of fetuses with up to 19 weeks of gestacional age, the presence in great amount of primordial and primary follicles is evident. From 22 weeks of gestation, the presence in great number, of follicles in different periods of growth is evident. From 17 weeks of gestation, was observed medullar cords with irregular lumen covered by cubical cells. The more characteristic variations occurred from 22 weeks of gestation.
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How to Cite
Monteiro, C. M. R., Carvalhal, R., & Perri, S. H. V. (2003). Morphological analysis of ovaries of Nelore bovine fetuses (Bos primigenius indicus) at various gestation stages. Brazilian Journal of Veterinary Research and Animal Science, 40(6), 409-415. https://doi.org/10.1590/S1413-95962003000600004
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