This study was conducted in the College of Agriculture - University Basra from 1/9/2020 to 15/1/2021 by collecting 120 blood samples males and females Arabi sheep breed, as well taking reproductive organs (testes ovaries) evaluate effect age, weight sex animals on sexual hormone levels . Samples were divided into three age groups (5-8 months, 9-12 months 1-1.5 years) body (15-25, 26-36, 37-47) ...