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Abstract

Artificial insemination (AI) with cooled stallion semen has increased markedly during the last decades in all countries, but fertility is often lower than when fresh semen or natural mating is used. The objective of this study was to examine field data (1634, cycles 523 Standardbred (SB) mares, 575 ...

Author(s)
Kareskoski, M.; Venhoranta, H.; Virtala, A. M.; Katila, T.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2019, 127, pp 7-14
Abstract

To increase the efficiency of equine semen, it could be useful to split the artificial insemination dose and refreeze the redundant spermatozoa. In experiment I, semen of 10 sires of the Hanoverian breed, with poor and good semen freezability, was collected by artificial vagina, centrifuged,...

Author(s)
Sielhorst, J.; Hagen, C.; Behrendt, D.; Schuette, B.; Burger, D.; Martinsson, G.; Sieme, H.
Publisher
Elsevier, New York, USA
Citation
Journal of Equine Veterinary Science, 2016, 40, pp 56-61
Abstract

Frozen-thawed boar sperm (FTS) has reduced motility and viability compared to cooled semen. Motility of FTS is related to in vitro and in vivo fertility, but this effect has not been determined in relation to the timing of ovulation. To test the effect of variable FTS motility in a multiple-AI...

Author(s)
McNamara, K. A.; Knox, R. V.
Publisher
American Society of Animal Science, Savoy, USA
Citation
Journal of Animal Science, 2013, 91, 12, pp 5637-5645
Abstract

In our experience, the testicular dysfunction that develops in aged stallions is typically progressive, contributing to a gradual deterioration in sperm output and quality over 2-4 years. As the ability to produce sufficient numbers of normal sperm in ejaculates declines, so do pregnancy rates...

Author(s)
Blanchard, T. L.; Varner, D. D.; Love, C. C.; Brinsko, S. P.; Morehead, J. P.
Publisher
Elsevier, New York, USA
Citation
Journal of Equine Veterinary Science, 2012, 32, 8, pp 430-435
Abstract

ABEL-AZIZ, A. S., BARR, G. R., and TYLER, W. J. Empirical analysis of models for estimating heritability: 986.
ACKERMAN, R. A., THOMAS, R. O., and BUTCHER, D. F. Effects of length of dry period on production: 976-977.
ALLAIRE, F. R. Selective value of milk yield among dairy cows: 973-974.
AEAVE, C. ...

Citation
Journal of Dairy Science, 1967, 50, pp 936-1017
Abstract

LITERATURE is reviewed. According to the author's own studies there is no correlation between the vaginal smears and the sexual stage. The microscopical pictures of vaginal smears did not give any evidence as to the time of onset of oestrus in 8 Karakul ewes as studied in over 650 preparations. 150 ...

Author(s)
HÖCKER, U.
Citation
Kuhn-Archiv, 1938, 47, pp 27-77
Abstract

AKINS, E. L., LTJDWICK, T. M., RICKARD, H. E., RADER, E. R., and ETGEN, W. M. Association of certain type evaluations and type scores of first-lactation Holstein females: 748. ALMQTJIST, J. O., AMANN, R. P., and O'DELL, W. T. Sperm reserves of dairy bulls as determined by depletion trials and...

Citation
Journal of Dairy Science, 1958, 41, pp 701-751
Abstract

Author(s)
Polge, C.
Publisher
CABI Publishing, Wallingford, UK
Citation
Animal Breeding Abstracts, 1956, 24, 3, pp 209-217
Abstract

ALBRIGHT, J. L., EHLEES, M. H., and EBB, R. E., Motility of sperm in milk diluent with and without seminal plasma: 922. BALDWIN, V. L., PETERSEN, W. E., and BAYLEY, N. D., Mammary gland measurements in calves and their prediction value in herds of varying environment: 933. BARR, H. L., LUDWICK, T....

Citation
Journal of Dairy Science, 1956, 39, pp 909-946
Abstract

THE State has now 5 cooperative units for artificial insemination, including about 5500 cows; the original unit, begun in May 1938, has 240 members with 2600 cows. Insemination rate per pregnancy varies for young as well as mature bulls and among bulls with the same semen density and sperm...

Author(s)
BARTLETT, J. W.; PERRY, E. J.
Citation
Record of Proceedings. American Society of Animal Production, 1939, pp 243-245

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