Successful Superovulation and Recovery of Embryos in Repeat Breeding Crossbred Cows

  • Zawar, Shyam (Raymond Embryo Research Center, Gopal Nagar-Bilaspur (Chhattisgarh), INDIA) ;
  • Mishra, U.K. (Raymond Embryo Research Center, Gopal Nagar-Bilaspur (Chhattisgarh), INDIA) ;
  • Gaswade, P.G. (Raymond Embryo Research Center, Gopal Nagar-Bilaspur (Chhattisgarh), INDIA)
  • Published : 2002.12.01

Abstract

The present study was undertaken to find out possibilities for superovulation and recovery of freezable/transferable embryo from repeat breeding crossbred cows. For this study a total of 10 Holstein crossbred cows having history of failure of conception even after more than 4~5inseminations were taken and superovulated using Folltropin-V at 100 to 140% dose schedule. The results indicated that out of 10 donors, 8 responded to superovulatory treatment and yielding a total of 94 embryos, out of which 45 were of transferable/freezable quality. The mean ovulations and mean transferable embryos were 11.5$\pm$2.91 and 4.5$\pm$1.66, respectively. These observations suggests that the repeat breeding cows having conception failure after several artificial inseminations can be used as donors for production of embryos and calves through embryo transfer technology.

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