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Abstract

Pregnancy per AI (P/AI) following the use of 1 of 2 timed AI (TAI) protocols and 2 different intervals between TAI and resynchronization were compared in heifers that were inseminated with either conventional or sex-sorted semen. Holstein heifers (n=317; 527 inseminations) were submitted to a 5-d...

Author(s)
Macmillan, K.; Loree, K.; Mapletoft, R. J.; Colazo, M. G.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2017, 100, 5, pp 4134-4138
Abstract

Research on the reproductive physiology of South American camelids is summarized and the application of new reproductive techniques to these species is reviewed. Artificial insemination, superovulation, embryo transfer and in vitro fertilization have now been succesfully applied to camelids. In...

Author(s)
Campo, M. R. del; Campo, C. H. del; Adams, G. P.; Mapletoft, R. J.
Citation
Theriogenology, 1995, 43, 1, pp 21-30
Abstract

56 cows received a norgestomet implant and an injection of norgestomet and oestradiol valerate; half (n = 28) received 500 IU equine chorionic gonadotropin (eCG) at implant removal, 9 days later. A third group (n = 25) received 2 injections of cloprostenol (500 µg) 11 days apart. The percentage of...

Author(s)
Kastelic, J. P.; Olson, W. O.; Martinez, M.; Cook, R. B.; Mapletoft, R. J.
Citation
Canadian Veterinary Journal, 1999, 40, 3, pp 173-178