Histoarchitectural Observation of the Vagina in Pre-laying and Laying Japanese Quail (Coturnix Coturnix Japonica)

- The oviduct was observed histomorphologically in the current study at several age groups during the pre-laying and laying stages. (Age weeks 4 and 5 are prelaying, while weeks 6 and 7 are laying). The tunica mucosa, tunica muscularis, and tunica serosa are the three layers that make up the vaginal wall in birds of all ages, arranged histomorphologically from inside to exterior. Pre-laying birds’ vaginal tunica mucosa developed tall, narrow primary mucosal folds that were longitudinally oriented, along with a few minor secondary and tertiary folds. The vaginal mucosal folds in laying birds, however, were large and had tertiary folds. A thin layer of loose connective tissue was known as tunica serosa in all age groups.