this study was carried out to compare the histomorphological structures of oviductal regionsof the apparently healthy adult laying hens (gallus gallus dometicus) and ducks (ansa ansadomesticus). for this purpose, 20 hens and 20 female ducks aged between 1–1.5 years were used.after euthanasia, the oviducts were dissected out and all of the gross morphometrical parametersincluding length, width a...