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Intervet/Schering-Plough Animal Health IPVS Symposium 2010

Continuous Throughput Compared with ‘All in-all out’ in the Management of a Farrowing Unit in Thailand

Suraphan Boonyawatan, Alex A.S. Eggen
Intervet/Schering Plough, Thailand & Intervet/Schering Plough International, the Netherlands


An all in-all out production system minimizes the transmission of infection between different age groups and batches of pigs. For a farm operating a continuous flow production system it is normally difficult to change to and manage an all in-all out system, but the economic benefits can be significant. Regumate® can be used to synchronize insemination and farrowing as a major step towards establishing an all in-all out system.

The aim of this study was to compare the production performance of a farrowing unit managed by continuous flow and by an all in-all out system.

Materials and Methods

This study was performed on a 400-sow farm arranged as follows. There were two farrowing houses each with 65 farrowing pens, and a dry sow house with 520 pens. Sows were served by AI (19-26 sows per week), and between 12 and 24 sows farrowed per week. The farm manager realized that this system did not allow for the proper cleaning and disinfection of the farrowing accommodation.

A batch farrowing system was instituted in January 2008 with estrus synchronized on a 3-week cycle using Regumate®. Thereafter 68-72 sows were inseminated every 3 weeks, and 55-65 sows farrowed in the same period. So the first batch of sows and gilts that was inseminated farrowed in March 2008 and their piglets were weaned in April 2008.

It is possible therefore to compare the performance of the farrowing unit between April 2007 and April 2008 (continuous production) and April 2008-April 2009 (All in-all out management) (Fig 1).

Fig 1. Stock management before and after the change

* each pig icon above represents five pigs


Twenty-one weeks after the change to batch farrowing, the farm could be divided into seven batches of 55-65 sows per batch. All the sows had been through the system, so the farrowing accommodation could be emptied, cleaned and disinfected. Many performance indicators improved in 2008 even though Thailand experienced a PED outbreak.

The performance in the farrowing unit is shown in Table 1.


After implementing all in-all out management a lot of improvements were seen on this farm.

In spite of 1% fewer sow inseminations, 18% more pigs were weaned. The farm was easier to manage. Inseminations were better planned and more controlled, and the labor force involved were more focused and less stressed.

The farrowing house could be properly cleaned and disinfected, and one of most important improvements was that the farm manager could organize and plan all aspects of production according to a reliable timetable.


  1. Gonyou H, Lemay S and Zhang Y 1999 Diseases of Swine, Editors Straw B Mengeling W D’Allaire S an Taylor D, p1024
  2. Gonyou H, Lemay S and Zhang Y 1999 Diseases of Swine, Editors Straw B Mengeling W D’Allaire S an Taylor D, p1087-1088
  3. J. Carr., et al 2004 Proceedings 18th IPVS Congress, Hamburg, Germany p822
  4. Busch, ME. et al. 2006 Proceeding of 19th IPVS congress, Copenhagen, Denmark O.37-02
  5. Pijoan C. et al. 2004 Proceedings 18th IPVS Congress, Hamburg, Germany

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