Three year results of in vitro production of bovine embryos in serum-poor bovine oviduct conditioned medium. An overview A. Van Langendonckt, A. Vansteenbrugge, I. Donnay, A. Van Soom, U. Berg, E. Semple, B. Grisart, P. Mermillod, G. Brem, A. Massip and F. Dessy Reprod. Nutr. Dev., 36 5 (1996) 493-502 DOI: 10.1051/rnd:19960505