Abstract
This study was conducted on the sheep of the Animal House/Tikrit university/College of Veterinary Medicine In period between 15.12.2009 to 30.1..2020, The total animal was used is 15 ewes . Five ml of blood samples were collected from the jugular vein in the different stages of the lactation , as the study include 15 th , 30 th and 45 th day of lactation. Where used for determine hematological and biochemical parameters.
 The results revealed A decreased (P ≤0.05) in total red blood cells, haemoglobin and packed cell volume, (4.6 ±1.03, 7.7 ±0.25, 23.1±1.56) respectively in 15 day of the lactation compare with 30th and 45 day of the lactation. The total white blood cells count were decreased (6.8 ±0.41) during the 45 day of the lactation. Results demonstrate significant decrease (P ≤0.05) in concentration total of protein, glucose, cholesterol ,triglyceride and urea concentration (6.8±0.18, 66.3 ±0.44, 52±0.78, 36.8±0.05, 28 ±0.45) respectively at the 15 day of lactation. While creatinine decreased (P ≤0.05) during the 45th day of the lactation (0.86±6.65). we conclude, from the study that there are present differences significant in hematological and biochemical parameters during the first stages of lactation.
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