however , serum ferritin concentration of calves administered 130 mg of ferrous fumarate ( 40 mg iron ) daily from 3 to 22 days of age or injected with 4 ml of iron-dextran intramuscularly ( 400 mg iron ) at 3 days and 2 wk of age increased sharply just after treatment and persisted high for 2 to 6 wk of age .
C0022092
iron-dextran
C0302583
iron