SwineMate (altrenogest) Solution 0.22% is for synchronization of estrus in sexually mature gilts that have had at least one estrous cycle. Treatment with altrenogest solution 0.22% results in estrus (standing heat) 4 to 9 days after completion of the 14-day treatment period. See package insert for complete product details. Call toll free 1-800-892-6978 or email us at info@animalhealthusa.com