Histomorphological Changes in the Oviduct Epithelium of the Rabbit During Early Pregnancy
2002
Anzaldúa, S. R. | Camacho‐Arroyo, I. | Cerbón, M. A.
In this study, we determined the histomorphological changes in different regions of the oviduct (fimbriae, infundibulum, ampullae and isthmus) during early pregnancy (days 1–4) of the rabbit. It was observed that the number of secretory cells (PAS‐positive cells) diminished in the fimbriae during the first 4 days of pregnancy with the corresponding increase in the number of non‐secretory cells (PAS‐negative cells). In contrast, there was an increase in the number of PAS‐positive cells in the isthmus during early pregnancy. In both the infundibulum and the ampullae the number of PAS‐positive cells was increased on day 3. A significant decrease in the height of the epithelium was observed in the fimbriae during early pregnancy. On the contrary, a significant increase in this parameter was observed in the isthmus during the first 3 days of pregnancy. A slight decrease in the height of the epithelium was observed in the infundibulum on day 4 of pregnancy, while in the ampullae it was significantly increased on days 1 and 3. The overall results indicate that during early pregnancy there is a selective modification in the histomorphological characteristics of the different regions of the rabbit oviduct.
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