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The aim of this study was to evaluate aspects morphometric, ultrastructural and histological structures present in the ovaries of female zebu. We used ten cows. In females that were synchronized, followed the standard protocol used in the technique of fixed time artificial insemination (FTAI). The ovaries were evaluated before synchronization and the day of surgery with the aid of ultrasound. On day 0 of the estrous cycle, two animals were ovariectomized, while the others went through the same process in their days: D5, D11, D14 and D19. The macroscopic structures were all considered. The ovaries had their axes maximum measured. For histological techniques all ovaries were processed and slides evaluated. When ultrasound was found that the average length and width of the ovaries did not have wide variation, and three animals have shown corpus luteum in the right ovary. After ovariectomy measuring the length and width of the ovaries was also performed and it was concluded that there is a significant difference between the morphometric measurement of cycling and anestrous females. Histologically, the structures found in the ovaries of cows differ only by the amount of primordial follicles.

Avaliação morfológica das estruturas ovarianas em fêmeas bovinas zebuínas durante o ciclo estral