Effect of the category of embryo donor (heifer, dry and lactating cow) on pregnancy rates of high-producing holstein recipients at 4th or later service - Ferreira, R. M. [UNESP]; Rodrigues, C. A.; Ayres, H.; Teixeira, A. A.; Oliveira, M. E. F. [UNESP]; Mancilha, R. F.; Pieroni, J. S. P. [UNESP]; Cordeiro, M. F. [UNESP]; Souza, S. F. [UNESP]; Fransceschini, P. H. [UNESP]; Vicente, W. R. R. [UNESP] (Blackwell Publishing, 2008)