TY - SER AU - Freling,G.F. AU - Gasperin,B.G. AU - Ferreira,R. AU - Cesaro,M.P. AU - Oliveira,J.F. AU - Bordignon,V. AU - Gonçalves,P.B.D. TI - Delaying farrowing using intravaginal devices impregnated with progestagen does not affect the proportion of pigles born alive KW - LEITÃO KW - REPRODUÇÃO ANIMAL KW - PARTO ER -