Stage of contrast on the level sex hormone before sexual mature in Awassi lamb

Abstract

Abstract The study was conducted on 4 male lambs of Awassi breed, Aged 4 months, presented in the farm of college of veterinary medicine, Anbar University, Anbar, Iraq. during the period from 10 May 2008, till 24 August 2008. The study were undertaken to show the effect of age months on the level of sex hormone in male lambs of Awassi breed. 10 ml blood samples were collected weekly into heparinized vacutainer tube from the jugular vein of each lambs. Blood was centrifuged (1000 ×g for 10 min) within 1h of collection and plasma was stored at -20c0 until. Plasma total testosterone concentrations, F.S.H. and ICSH were determined by ELAS. Testosterone was shown to be higher during 7 and 6 age months (0.682 ± 0.17 and 0.489 ± 4.17) mIU/ml-1, 5 and 4. F.S.H was shown to be significantly increase (P<0.05) during 4 age month (24.928 ± 27.25) mIU/ml-1 as compared with 5, 6 and 7. ICSH showed to be higher during 4 and 5 (2.971 ± 3.01 and 2.555 ± 2.27) mIU/ml-1 as compared with 6 and 7.It was concluded from this study that there was an effect of age months on the level sex hormone (Testosterone, F.S.H and ICSH).