5Congie Y.. State of the antic Sheep - goat embryo transfer(J). TheriogEnology, 1999,51 : 105 - 116
6Hiroyoshi Hoshi, In vitro production of bovine embryos and their application for embryo transfer[J]. Therloganology, 2003,59 : 675 - 685
7Wilmut I. ,Yung L. ,Desousa P. ,et al. New opportunities in animal breeding and production- an introductoryremark[J]. Animal Reproduction Science, 2000,60: 5 - 14
8Wilmut I., Schnieke AE., MeW hir J., et al. Viable off-spring derived from fetal and adult mammalian eells[J]. Nature, 1997, 385: 810-813
9Evans G. , Maxwell WMC. , Wilson HR. Superovulation and embryo recovery in Merino ewes[J]. Theriogenology, 1994,41 : 192
10McCue P. , Carney N. , Hughes J. , et al. Ovulation and embryo recovery rates following immunizing of mares against an inhibin alpha - subunitfragment[J]. Theriogenology, 1992,38 : 823 - 831
