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Abstract

Hofmann (1935) submitted a proposal, using a timed mating and farrowing system to program the reproductive dates in a sow herd and thus to direct the breeding and production cycle taut. In 1958 to 1964, the developed system of periodic farrowing was operated in Thuringia first farms successfully...

Author(s)
Hühn, U.; Wähner, M.
Publisher
Eugen Ulmer KG, Stuttgart, Germany
Citation
Züchtungskunde, 2016, 88, 4, pp 268-281
Abstract

This article discusses the modification in the insemination and farrowing schedule of sows at every three-week interval to properly manage the litter and enhance farm hygiene and sanitation, along with the shortened lactation duration for sows. The advantages, benefits and disadvantages of the...

Author(s)
Hilgers, J.; Hühn, U.
Publisher
Besamungsverein Neustadt a.d. Aisch e.V., Neustadt a.d. Aisch, Germany
Citation
Zuchtwahl und Besamung, 2013, No.169, pp 56-59
Abstract

Improvement of reproductive performance in pigs through careful monitoring of artificial insemination in sows is discussed in this article. Focus is given on determining the optimum time for insemination, factors included in insemination monitoring, application of insemination monitoring and...

Author(s)
Hoy, S.
Publisher
Besamungsverein Neustadt a.d. Aisch e.V., Neustadt a.d. Aisch, Germany
Citation
Zuchtwahl und Besamung, 2012, No.168, pp 60-62
Abstract

Analysis of the reasons for culling of purchased gilts and 2. check-up studies on the percentage of animals fit for breeding following heat synchronization and artificial insemination over a period of 10 years (1999-2008). Basis: records of veterinary herd management service. Material and methods:...

Author(s)
Heurich, U.; Hühn, U.
Publisher
Schattauer GmbH, Stuttgart, Germany
Citation
Tierärztliche Praxis. Ausgabe G, Grosstiere/Nutztiere, 2010, 38, 4, pp 219-224
Abstract

The problems related to unregular ovulating sows on German pig farms using the 3-week production rythm are outlined. These sows can often not join regular farrowing groups and increase the number of non-productive days significantly. Potential causes for these problems are listed. A system is...

Publisher
Landwirtschaftsverlag GmbH, Münster-Hiltrup, Germany
Citation
SUS - Schweinezucht und Schweinemast, 2009, No.4, pp 58-61
Abstract

The study investigated the effect of additional illumination prior to artificial insemination on the reproductive performance of sows and gilts. Additional illumination was provided after weaning of piglets (sows) and after the last administration of regumate (gilts). In gilts, additional...

Author(s)
Lau, H.
Publisher
Eugen Ulmer GmbH, Stuttgart, Germany
Citation
Züchtungskunde, 2008, 80, 3, pp 213-223
Abstract

Based on profound biologic knowledge, several methods to control and regulate porcine reproduction (induction of puberty, synchronization of oestrus and ovulation, fix-time insemination, induction and synchronization of parturition) have been developed and improved during the last 35 years....

Author(s)
Brüssow, K. P.; Wähner, M.
Publisher
Verlag Eugen Ulmer GmbH, Stuttgart, Germany
Citation
Züchtungskunde, 2005, 77, 2/3, pp 157-170
Abstract

Methods aimed at programmed pig production are summarized with reference to recent practice in Germany, under the headings: oestrus synchronization in gilts; ovulation synchronization with time-orientated insemination; farrowing synchronization.

Author(s)
Wähner, M.
Publisher
Besamungsverein Neustadt a.d. Aisch e.V., Neustadt a.d. Aisch, Germany
Citation
Zuchtwahl und Besamung, 2003, No.150, pp 58-60
Abstract

In 1985, in the German Democratic Republic, 1 913 706 sow inseminations were carried out, of which 1 787 477 were 1st inseminations; the number of inseminated ♀♀ represented 81.3% of the total population. The av. CR was 79.9%, the number of liveborn piglets per litter averaged 10.20 and the number...

Author(s)
Keil, H.W.; Sondermann, R.; Hühn, U.; Henze, A.
Citation
Tierzucht, 1986, 40, 6, pp 260-262
Abstract

Of 450 572 sows treated and fixed-time inseminated in 1979, 78.5% conceived and 75.3% farrowed vs. 71.4 and 67.2% resp. of 229 327 similarly treated gilts. Litter size at farrowing and weaning averaged 10.8 and 10.2 resp. for sows, and 9.3 and 8.9 for gilts. Details are given of 8 methods of...

Author(s)
Henze, A.; Huhn, U.
Citation
Tierzucht, 1980, 34, 12, pp 545-548

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