4Jacobson L A.World's first sex-selected call.http://www.xyinc.com/history/history.php,2004.
5Johnson L A.Sexing mammalian sperm for the production of offspring:The state-of-the-art[J].Anim Reprod Sci,2000,61:93-107.
6Johnson L A,Welch G R,Rens W.The beltsville sperm sexing technology:High-speed sorting gives improved sperm output for in vitro fertilization and AI[J].J Anim Sci,1999,77:213-220.
7Seidel G E,Schenk Jr J L,Herickhoff L A,et al.Insemination of heifers with sexed sperm[J].Theriogenology,1999,52:1407-1420.
8Seidel G E Jr,Schenk J L.Field trials with sexed,frozen bovine semen[R].In Proc 19th Tech.Conf on Artificial Insemination and Reproduction,Natl Assn of Animal Breeders Columbia,2002,64-69.
9Weigel K A.Exploring the role of sexed semen in dairy production systems[J].J Dairy Sci,2004,87(E.Suppl.):120-130.
10Sartori R,Souza A H,Guenther J N,et al.Fertilization rate and embryo quality in superovulated Holstein heifers artificially inseminated with X-sorted or unsorted sperm[J].Anim Reprod,2004,(1):86-90.