Each pound of this product provides 1.0 mg of Melengesterol Acetate /head/day. Feed at the rate of 0.5 lb/head/day to supply 0.5 mg/head/day melengesterol acetate. A reduced conception rate can be expected if heifers are bred at estruses observed within 1 to 12 days after withdrawal of Melengesterol Acetate, whereas heifers bred at subsequent observed estrus are expected to have normal conception rates. Provide plenty of fresh, clean water at all times. CAUTION: Withdrawal periods of 3-5 days should be avoided to prevent the possibility that heifers may come into estrus at loading time. Not effective in steer or spayed heifers. Heifers intended for reproduction, do not exceed 24 days of feeding.