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In the 1st experiment, 18 beef heifers were assigned to non-ablation and 20 to ablation groups. In non-ablated heifers, superstimulatory treatment was given as a single subcutaneous injection (Follitropin-V, 400 mg) at mid-dioestrus to coincide with emergence of the spontaneous follicular wave 8-12 ...

Bergfelt, D. R.; Bo, G. A.; Mapletoft, R. J.; Adams, G. P.
Animal Reproduction Science, 1997, 49, 1, pp 1-12

Two experiments were conducted to determine oestrous response and pregnancy rate in beef cattle given a controlled internal drug release (CIDR-B) device plus PGF at CIDR-B removal, and estradiol or GnRH. In Experiment I, crossbred beef heifers received a CIDR-B device and 1 mg estradiol benzoate...

Martínez, M. F.; Kastelic, J. P.; Adams, G. P.; Janzen, E.; McCartney, D. H.; Mapletoft, R. J.
Canadian Veterinary Medical Association, Ottawa, Canada
Canadian Veterinary Journal, 2000, 41, 10, pp 786-790

Two experiments were conducted to compare pregnancy rates when GnRH or estradiol were given to synchronize ovarian follicular wave emergence and ovulation in an MGA-based oestrus synchronization programme. Crossbred beef cattle were fed melengestrol acetate (MGA, 0.5 mg per day) for 7 days...

Martinez, M. F.; Kastelic, J. P.; Adams, G. P.; Mapletoft, R. J.
Elsevier Science B.V., Amsterdam, Netherlands
Animal Reproduction Science, 2001, 67, 3/4, pp 221-229

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