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Animal Science Database

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Abstract

Pregnancy in cattle relates to the fertilizing capacity of the spermatozoa inseminated and it is dependent on a series of physiological events and interactions occurring in the female. Among these are the manifestation of normal oestrus, sperm transport and the establishment of a sperm reservoir in ...

Author(s)
Rodriguez-Martinez, H.; Bǻge, R.; Gustafsson, H.; Larsson, B.
Publisher
University of Bologna, Reggio Emilia, Italy
Citation
Proceedings of the International Symposium, Reggio Emilia, Italy, 8-9 October, 1999. From the first artificial insemination to the modern reproduction biotechnologies: traditional ways and new frontiers of animal production. , 1999, pp 119-137
Abstract

11 Swedish Red-and-White and Swedish Friesian heifers with normal oestrous cycles were monitored for signs of oestrus; the growth of the ovulatory follicle and ovulation were determined by frequent ultrasonic scanning and artificial insemination was carried out 12 h after the detection of standing...

Author(s)
Duchens, M.; Forsberg, M.; Gustafsson, H.; Edqvist, L.; Rodríguez-Martínez, H.
Citation
Animal Reproduction Science, 1995, 39, 3, pp 171-182
Abstract

Gonadotropin-releasing hormone (GnRH) has been used to warrant the success of artificial insemination by accurately timing occurrence of ovulation. In practical conditions, GnRH may be administered too late, after ovulation, with an eventual reduction in pregnancy rate. The aim of this study was to ...

Author(s)
Taponen, J.; Rodríguez-Martínez, H.; Katila, T.
Publisher
Elsevier Science B.V., Amsterdam, Netherlands
Citation
Animal Reproduction Science, 2000, 64, 3/4, pp 161-169
Abstract

In an experiment involving 277 cycling females , the females were injected with 5 mg Alfaprostol (a PGF2 alpha analogue) during spring 1979 or with 1.5 mg Alfaprostol/kg body weight during winter 1979/80. In both seasons, the females were treated according to 1 of 3 regimes: (1) 2 injections with...

Author(s)
Jochle, W.; Kuzmanov, D.; Vujosevic, J.
Citation
Theriogenology, 1982, 18, 2, pp 215-225
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
Abstract

No significant breed or seasonal differences were found for length of oestrus and time of ovulation after end of oestrus among Ayrshires, Guernseys, Jerseys and Holsteins.
Duration of oestrus of 17.8 hrs. for 86 cows was significantly longer than the average of 15.3 hrs. for 46 heifers. The cows ...

Author(s)
TRIMBERGER, G. W.
Citation
Research Bulletin. Nebraska Agricultural Experiment Station, 1948, 153, pp 26 pp.
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

ALEXANDER, M. H. A study of the inheritance of persistency in milk production: 375.ALEXANDER, M. H. Length of gestation in the five major breeds of dairy cattle: 377-378.ALMQUIST, J. O., and PRINCE, P. W. The effect of a combination of penicillin, streptomycin and sulfanilamide upon the fertility...

Citation
Journal of Dairy Science, 1950, 33, pp 375-412
Abstract

Adams, C. R., Becker, D. E., Terrill, S. W., Norton, H. W., and Jensen, A. H. Rate of ovulation and implantation in swine as affected by dietary protein: 1245. Alliston, C. W., and Ulberg, L. C. Early pregnancy loss in sheep at ambient temperatures of 70° and 90° F. : 1316. Anderson, D. E., and...

Citation
Journal of Animal Science, 1960, 19, pp 1216-1339

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