Allows synchronization of estrus (heat), so gilt pool can be brought into heat when it is convenient and efficient. 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) four to nine days after completion of the 14-day treatment period. Do not use in gilts having a previous or current history of uterine inflammation (i.e., acute, subacute or chronic endometritis). Underdosing of MATRIX may lead to the occurrence of cystic follicles. Gilts must not be slaughtered for human consumption for 21 days after the last treatment. For complete information on use/handling of this product, see accompanying product package insert.

Maximizes pig flow by helping more gilts and weaned sows cycle, particularly in summer, producing more pigs when market prices are high. For induction of estrus in prepuberal gilts and weaned sows experiencing delayed return to estrus. For induction of estrus in healthy weaned sows experiencing delayed return to estrus. Treatment will not induce estrus in gilts that have already reached puberty (begun to cycle). Gilts that are less than five and one-half months of age or that weigh less than 85 kg (187 lb.) may not be mature enough to continue normal estrus cycles or maintain a normal pregnancy to full term after treatment.

This product has been shown to be effective for the vaccination of healthy swine 3 weeks of age or older against respiratory disease caused by Porcine Reproductive and Respiratory Syndrome (PRRS) virus and female breeding age swine against reproductive disease caused by PRRS virus.