الفهرس 
Cover Page Title in EnglishOnly 14 pages are availabe for public view
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Abstract
The present study investigated the biochemical effects of number of kids in ewes at peripartum period. Twenty crossbred ewes were allocated into two groups. Group (1): 12 ewes bearing single lambs, and group (2): 8 ewes bearing twin lambs. Considering the lambing day as day zero, blood samples were collected at — 21, - 7, +7, +14 and +21 days, respectively. Serum levels of progesterone, oestradiol-1713 and cortisol were determined by radioimmunoassay. Glucose, total cholesterol, triacyiglycerol, total lipids and serum proteins were colorimetrically determined. Protein fractions were determined by polyaciylamide gel electrophoresis. Inorganic phosphorus, calcium and niagnesium, alkaline phosphatase activity and arninotransferases (aspartate aminotransferase, AST and alanine aminotransferase, ALT) activities were colorimetrically determined.
Serum progesterone levels significantly increased at 21 and 7 days before lambing in ewes bearing twins than in ewes bearing single lambs.
I Serum oestradiol- 1713 levels significantly increased in ewes bearing twins at 7 days before lambing than in ewes bearing single lambs.
J Serum cortisol levels showed significant changes during different stages in both ewe groups.
Serum glucose levels were significantly lower at 7 days before, 7 and 14 days after lambing in ewes bearing twins than in ewes hearing single lambs.