Double insemination and gonadotropin-releasing hormone treatment of repeat-breeding dairy cattle.

@article{Stevenson1990DoubleIA,
  title={Double insemination and gonadotropin-releasing hormone treatment of repeat-breeding dairy cattle.},
  author={Jeffrey S. Stevenson and E P Call and R K Scoby and A P Phatak},
  journal={Journal of dairy science},
  year={1990},
  volume={73 7},
  pages={1766-72}
}
Our objective was to determine if double inseminations during the same estrous period of dairy cattle eligible for their third or fourth service (repeat breeders) would improve pregnancy rates equivalent to injections of GnRH given at the time of AI. Repeat-breeding, lactating cows from six herds (five herds in the San Joaquin Valley of central California and one herd in northeast Kansas) were assigned randomly to four treatment groups when detected in estrus: 1) single AI plus no injection, 2… CONTINUE READING

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