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Animal Science Database

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Abstract

This is a review of the physiology and endocrinology of the estrous cycle and how ovarian physiology can be manipulated and controlled for timed artificial insemination (TAI) in beef and dairy cattle. Estrus detection is required for artificial insemination (AI), but it is done poorly in dairy...

Author(s)
Colazo, M. G.; Mapletoft, R. J.
Publisher
Canadian Veterinary Medical Association, Ottawa, Canada
Citation
Canadian Veterinary Journal, 2014, 55, 8, pp 772-780
Abstract

This study investigated bovine conceptus-induced modifications to the endometrial transcriptome related to effects of interferon tau (IFNT), conceptus origin (in vivo vs. in vitro), and conceptus sex. In vitro (IVF) or in vivo (superovulation and artificial insemination, AI) produced blastocysts...

Author(s)
Mathew, D. J.; Sánchez, J. M.; Passaro, C.; Charpigny, G.; Behura, S. K.; Spencer, T. E.; Lonergan, P.
Publisher
Oxford University Press, Cary, USA
Citation
Biology of Reproduction, 2019, 100, 2, pp 365-380
Abstract

The aim of this study was to compare estradiol benzoate (EB) and GnRH for the induction of ovulation in a TAI protocol in buffalo during the nonbreeding season. In experiment 1, 141 buffaloes (56 cows and 85 heifers) received an intravaginal P4 device (1.0 g) plus EB (2.0-mg, intramuscular [im]) at ...

Author(s)
Carvalho, N. A. T.; Soares, J. G.; Souza, D. C.; Maio, J. R. G.; Sales, J. N. S.; Martins Júnior, B.; Macari, R. C.; D'Occhio, M. J.; Baruselli, P. S.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2017, 87, pp 333-338
Abstract

The study of reproductive physiology in domestic ruminants has progressed from the whole animal to the molecular level in an amazingly short period of time. The volume of information on this subject is enormous; therefore, we have focused on domestic ruminants, with an emphasis on cattle. To date, ...

Author(s)
Smith, M. F.; Geisert, R. D.; Parrish, J. J.
Publisher
Oxford University Press, Cary, USA
Citation
Journal of Animal Science, 2018, 96, 7, pp 2952-2970
Abstract

Numerous treatments and protocols have been used to control the reproductive cycle in cattle, with varying effectiveness and many involving the administration of steroid hormones. Steroid hormones, such as estradiol, are perceived as having a negative impact on consumer health. This internationally ...

Author(s)
Yapura, M. J.; Zwiefelhofer, E. M.; Pierson, R. A.; Adams, G. P.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2018, 112, pp 18-25
Abstract

The aim of the present study was to evaluate the effects of the PGF treatment given at the onset of a synchronization of ovulation protocol using a norgestomet (NORG) ear implant on ovarian follicular dynamics (Experiment 1) and pregnancy per AI (P/AI; Experiment 2) in cyclic (CL present) Bos...

Author(s)
SáFilho, M. F.; Marques, M. O.; Gimenes, L. U.; Torres Júnior, J. R. S.; Batista, E. O. S.; Carvalho, J. P. B.; Baruselli, P. S.
Publisher
Elsevier B. V., Amsterdam, Netherlands
Citation
Animal Reproduction Science, 2014, 144, 1/2, pp 1-5
Abstract

Two experiments evaluated long-term controlled internal drug release (CIDR) insert-based protocols to synchronize estrus and compare differences in their potential ability to facilitate fixed-time artificial insemination (FTAI) in beef heifers. In Experiment 1 estrous cycling heifers (n=85) were...

Author(s)
Leitman, N. R.; Busch, D. C.; Mallory, D. A.; Wilson, D. J.; Ellersieck, M. R.; Smith, M. F.; Patterson, D. J.
Publisher
Elsevier, Amsterdam, Netherlands
Citation
Animal Reproduction Science, 2009, 114, 4, pp 345-355
Abstract

The objective of this study was to determine the effects of low versus physiologic plasma progesterone concentrations during the ovulatory wave on fertility in cattle. Suckled beef cows (Bos taurus; n=129) and pubertal heifers (Bos taurus; n=150) at random stages of the estrous cycle were given a...

Author(s)
Pfeifer, L. F. M.; Mapletoft, R. J.; Kastelic, J. P.; Small, J. A.; Adams, G. P.; Dionello, N. J.; Singh, J.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2009, 72, 9, pp 1237-1250
Abstract

This study was designed to evaluate the effect on fertility of 0.4 mg. per 1b. body weight per day of MAP when given under controlled conditions to 15- to 18-mth-old Holstein heifers weighing 630-825 1b. ; the animals were concurrently under trial in a nutritional experiment (2 types of hay). MAP...

Author(s)
FAHNING, M. L.; SCHULTZ, R. H.; GRAHAM, E. F.; DONKER, J. D.; MOHRENWEISER, H. W.
Citation
Journal of Reproduction and Fertility, 1966, 12, pp 569-571
Abstract

Three methods of regulating the oestrous cycle in Hereford cattle were studied in 3 separate trials. In Trial I an attempt was made to bring 27 Hereford heifers into oestrus during a target period of 3 days by altering the naturally occurring cycles, where necessary, by recycling by means of...

Author(s)
HANSEL, W.; MALVEN, P. V.; BLACK, D. L.
Citation
Journal of Animal Science, 1961, 20, pp 621-625

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