Current low levels of response with embryo transfer technology restrict the rate of genetic improvement possible with multiple ovulation and embryo transfer (MOET) breeding schemes. The problems include no response to superovulation, variable embryo numbers and quality and pregnancy rates. In vitro fertilization (IVF) technology offers the possibility of obtaining large numbers of offspring per female. Implications of IVF on breeding programs are discussed.

H. W Leitch, C. Smith, E. B Burnside

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume XIV. Dairy cattle genetics and breeding, adaptation and conservation., , 279–282, 1990
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