Effects of season on the reproductive organs and steroid hormone profiles in guinea hens (Numida meleagris)

Abdul-Rahman, I.I., Obese, F.Y., Robinson, J.E. , Awumbila, B. and Jeffcoate, I.A. (2016) Effects of season on the reproductive organs and steroid hormone profiles in guinea hens (Numida meleagris). British Poultry Science, 57(2), pp. 280-286. (doi: 10.1080/00071668.2016.1154504) (PMID:26951954)

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1. The study documented gross anatomical and histological differences in the reproductive organs of 28 breeding and non-breeding female guinea fowls. Peripheral progesterone and 17β-oestradiol concentrations were also compared in breeding and non-breeding hens. 2. In non-breeding females, all ovarian and oviducal gross anatomical features had significantly regressed. Histologically, some of the changes in a regressing oviduct include systematic changes in height and size of all epithelial cells in all regions of the duct, absence/sparse ciliation of portions of surface epithelium in the magnum, isthmian and uterine regions, general loss of cytoplasmic mass, reduction in size and degeneration of tubular glands. Mucosal folds in all regions of the oviduct except the infundibular lip were higher in breeding females. 3. No difference was found between the two groups in plasma progesterone concentrations. Breeding females, however, had higher peripheral oestradiol concentrations than non-breeding females. About 2 h prior to oviposition, plasma oestradiol concentrations peaked at 2.4-fold (230 pg/ml) compared with baseline concentration and plasma progesterone concentrations by nearly 9-fold (5.29 ng/ml) of baseline. 4. Significant regression and changes in the histological structure of the ovary and oviduct had occurred in non-breeding females, and lower peripheral oestrogen concentrations may be responsible for this phenomenon.

Item Type:Articles
Additional Information:Funding for the project was partly provided by theCommonwealth Scholarship Commission in the UK,and Association of Commonwealth Universities(CSC Ref No: 2009-378).
Glasgow Author(s) Enlighten ID:Robinson, Dr Jane
Authors: Abdul-Rahman, I.I., Obese, F.Y., Robinson, J.E., Awumbila, B., and Jeffcoate, I.A.
College/School:College of Medical Veterinary and Life Sciences > Institute of Biodiversity Animal Health and Comparative Medicine
Journal Name:British Poultry Science
Journal Abbr.:Br Poult Sci
Publisher:Taylor & Francis
ISSN (Online):1466-1799
Published Online:25 April 2016

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