Alterações histológicas e morfométricas da tuba uterina de cabras sem raça definida durante o ciclo estral

Abstract

This study aimed to characterize the changes in morphology and cell composition in goats uterine tube during the estrous cycle. Twenty adult undefined breed goats were used: Group 1 (D3) M - 3rd days after ovulation; Group 2 (D12) D - 12th days after ovulation (p.o.); Group 3 (D18) P - 18th day and group 4 (D22) E - 22nd p.o., corresponding metestrus, diestrus, proestrus and estrus, respectively. After hormone treatment, the animals were slaughtered, and their oviduct collected. The oviduct length was measured and fixed in 10% formaldehyde for 24h, for histomorphometric analysis. Afterward, the fragments were subjected to standard histological processing. Thus, it was measured the epithelium height and quantified the ciliated cells (CC) and secretory cells (SC). In this study, the lengths at the different regions of the goat oviduct varied according to the different phases of the estrous cycle, with lower values at 22 days p.o. (group 4). While the epithelium height increased in regions of the oviduct as it departed from the estrus (group 4). All fimbriae and infundibulum, the proportion of CC was higher than SC, regardless of the phase of the cycle, with the highest percentage in group 4. In the isthmus, SC prevailed throughout the cycle, being also significantly higher in group 4. In the ampulla, there was no significant difference between the CC and SC, except for groups 3 and 4, in which CC predominated. So the goats uterine tube has morphological and morphometric alteration during the estrous cycle.