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Modulation of body physiology and metabolism is a prerequisite for successful pregnancy in camels, which is about a year and few months. The present study was carried out to verify the effect of pregnancy on histomorphometry and functional traits of thyroid gland, as well as some biochemical indices of liver and kidney functions and mineral profile in one humped camels, under Egyptian climatic conditions or desert conditions. The thyroid tissues were fixed in 10% formalin solution and processed following routine histological techniques after gross examination and biometric assessment. Serum levels of thyroid hormones (triiodothyronine, thyroxineand thyroid stimulating hormone), serum blood metabolites (total bilirubin, blood urea nitrogen and creatinine), liver enzymatic activity (aspartate transaminase (AST), alanine transaminase (ALT) and alkaline phosphatase (ALP)), and minerals (sodium, potassium, calcium and phosphorus) were estimated in pregnant (n=30) and non-pregnant (n=30) camels. There were no significant differences between the right and left thyroid lobes between pregnant and non-pregnant camel. Pregnant status in camels had insignificant influence on histological and functional traits of thyroid as well as serum blood metabolites, liver enzymes and minerals levels, as compared with non-pregnant animals during the first six months of pregnancy. Therefore, reproductive status (during early pregnancy) has no substantial effect on camel physiological mechanisms or metabolic activity.   Key words: Biochemical, dromedary, histology, thyroid gland, thyroid hormones.

Histomorphometry aspect of thyroid gland and biochemical profile in pregnant and non-pregnant dromedary camels