1. The effects of implanting turkeys with trienbolone acetate (TA) upon fluid balance and blood chemistry were studied. 2. The Na and water contents of skeletal muscles were increased by TA treatment while K was unaltered. 3. The extracellular space expressed as a proportion of starved body weight was unaffected by TA implantation. 4. Plasma or serum concentrations of P, Ca, Mg, Na and K and activities of the enzymes aspartate aminotransferase EC 2.6.1.1], creatine kinase EG 2.7.3.2] and γ‐glutamyl transferase EC 2.3.2.2] were not changed by TA treatment. 5. Packed cell volume was significantly increased by TA implantation after a delay of some 2 to 3 weeks while plasma protein concentrations were immediately decreased for a period of two weeks before nearly normal concentrations were obtained again. 6. Erythrocyte sedimentation rate was decreased by TA treatment, but serum protein electrophoretic pattern was unchanged. |