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Abstract: It is now established practice to upgrade the protein content of low quality roughage by urea treatment. Administration of urea may result in some adverse effects. This study was carried out to investigate the effects of feeding urea-treated wheat straw diet on the hormonal and metabolic environment of ovarian follicles. Feeding of urea-treated wheat straw to camels resulted in significantly increased concentration of serum and follicular fluid urea compared to their counterparts that fed straw only. The increased urea in follicular fluid was accompanied by decreased concentration of estradiol 17 β and progesterone and increased activity of lactic dehydrogenase in the fluid. This suggested that feeding of high urea diets may affect follicular fluid composition and development of oocyte.