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Int. j. morphol ; 26(1): 113-120, 2008. ilus
Article in English | LILACS | ID: lil-558583

ABSTRACT

The ovarian histology, the structural and the ultrastructural characteristics of the folliculogenesis in Didelphis albiventris were described in detail. Recent studies suggest that methatherian mammals have unusual reproductive cycle but there are few informations regarding the marsupials reproductive life. Despite of the opossum folliculogenesis pattern resembles methatherian and eutherian pattern in many aspects, the analysis shows some peculiar features of the oocyte structure and ultrastructure that make available new data on the reproductive biology of marsupials.


Fueron descritas con detalles la histología ovárica, las características estructurales y ultra-estructurales de la foliculogénesis del Didelphys albiventris. Estudios recientes sugieren que mamíferos metaterios tienen un ciclo reproductivo inusual, pero existen pocas informaciones en relación a la vida reproductiva de los marsupiales. A pesar de que el modelo de foliculogénesis de la zarigüeya se parece al modelo metaterio y euterio en muchos aspectos, el análisis muestra algunos rasgos peculiares de las estructura y ultra-estructura del oocito, que colocan a disposición nuevos datos en la biología reproductiva de los marsupiales.


Subject(s)
Animals , Ovarian Follicle/anatomy & histology , Ovarian Follicle/growth & development , Oocytes/growth & development , Opossums/anatomy & histology , Ovarian Follicle/ultrastructure , Oocytes/ultrastructure
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