Davis, Duane L.2009-10-292009-10-292009-10-29http://hdl.handle.net/2097/1975Altrenogest, marketed for use in horses as Regumate, is a synthetic progestin that is marketed for use in pigs as MATRIX. It effectively regulates the occurrence of estrus in randomly cycling gilts if it is provided for 14 or more days at a daily dose of 15 mg/day. It is important to assure that each gilt receives her full dose; otherwise problems of cystic follicles and reduced fertility may be observed.PigsEstrous synchronizationAltrenogestSwineConference paper