Procedures to reduce the incidence of Stillborn Pigs through the use of antagonists of the progesterone receptor

摘要

Refers to a procedure for Inducing parturition in sows Prenadas, which will result in the Birth of the first Breeding in a predictable number of hours between 12 hours and 22 hours.The process comprises: (1) the Administration of a progesterone receptor antagonist Prenadas sows that are at least 112 days after mating, the antagonist, selected from: ru38486, zk230211, zk98299, zk98774, zk137316, zk112993, j867, j956, lgoo1447, lg120753 , org33628, mifepristone and lilopristone onapristone, combinations thereof,Which can be administered once or twice, between the Single Dose of approximately 0.001 mg / kg, and 15 mg / kg body weight and Applied 20 to 25 hours before birth and in the first two Administrations, is 30 to 40 hours before birth and the second approximately 9 to 15 Hours before birth