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Some placental factors and their relevance to variation in birth weight of Karadi lambs

Author(s): R. A. S. Oramari, | J. E. Alkass, | H. N. Hermiz | Y. Y. Hussein

Journal: Research Opinions in Animal & Veterinary Sciences
ISSN 2221-1896

Volume: 1;
Issue: 3;
Start page: 165;
Date: 2011;
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Keywords: Cotyledons | Birth Weight | Karadi Lambs

At the animal farm, college of Agriculture, University of Duhok, foetal placenta of 77 karadi ewes shed from normal parturitions were collected within 24 hours. The foetal cotyledons were separated from the placenta, counted and weighed. Also, the weights of lambs were recorded within 24 hours post lambing. The overall mean number and weight of cotyledons were 64.39±1.51 and 123.08±4.23 gm, respectively. Ewes with male lambs and single birth had significantly heavier cotyledons than females (130.51 vs. 116.41 gm) and twin birth (134.48 vs. 112.44 gm). A highly significant positive correlation between birth weight and each of number (0.34) and weight of cotyledons (0.64) was observed. Also, the regression of birth weight of lambs on cotyledons weight was significant. A significant positive correlation between ewe body weight at lambing and cotyledon weight (0.41) was noticed. It can be concluded that weight of cotyledons had the major role in influencing the birth weight of lambs.
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