Abstract
The most interesting results were obtained when studying the Iraqi Awassi female sheep for leptin and erythropoietin. Leptin hormone concentrations the ewes were divided into three groups according to the levels of leptin and erythropoietin concentrations, low, medium and high, as well as progesterone and estrogen concentrations, increase in ewes with medium leptin concentrations. Leptin concentration had no effect on fertility rate, but twins rates increased in ewes with medium leptin concentration. Dams milk components increased with high level of leptin, while other components remained unchanged. Similarly, erythropoietin concentration and progesterone level were linked to ewes fertility, with the highest progesterone value being 0.29 in medium ewes.
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