... sensitivity of the antibody in the low range of leptin values, is as effective and reliable as anovine-specific RIA in determining leptin plasma profiles in the bovine species. The sensitivity of leptin ... IU/kg of vitamin D3, 1880 mg/kg of vitamin E, 31.50 mg/kg of vitamin B1, 21 mg/kg of vitamin B2, 11 mg/kg of vitamin B6, 0.21 mg/kg of vitamin B12, 0.21 mg/kg of biotin, 2100 mg/kg of ... resumption of ciclicity is linked to reduced leptinlevels [7-9]. The peripartum period is therefore very interesting from aleptin point of view, because of the contemporary occur-rence of parturition,...