1Foxcroft GR, Dixon wr, Novak S, Putnam CT, Town Sc, Vinsky MDA. The biological basis for prenatal programming of postnatal performance in pigs. J Anim Sci. 2006;84(E. Suppl):El 05-12.
2PigChamp. USA 2012 - year end summary. 2013. http:llbenchmarkJarms. coml2013_Summary_oUhe_2012_data.html.
3Stalder KJ. Pork industry productivity analysis, research grant report. Des Moines, Iowa: National Pork Board; 2014. p. 1-13.
4Ketchem R, Rix M. SMS Database Revision Reveals Intriguing Production Trends. National Hog Farmer. 2014. (Online Exclusive http:llnationalhogfarmer. comlbusinesslsms-database-revision-reveals-intriguing-production-trends7 page=1). 2014. January 6, 2014.
5Knox RV, Rodriguez Zas SL, Sioter NL, McNamara KA, Gall TJ, Levis DG, et al An analysis of survey data by size of the breeding herd for the reproductive management practices of North American sow farms. J Anim Sci. 2013;91 :433-45.
6Engblom L, Lundeheim N, Strandberg E, Schneider MP, Dalin AM, Andersson K. Factors affecting length of productive life in Swedish commercial sows. J Anim Sci. 2008;86:432-41.
7Gill P. Nutritional management of the gilt for lifetime productivity - feeding for fitness or fatness? In: London Swine Conference Proceedings. London, Ontario: Today's Challenges ... Tomorrow's Opportunities. 2007. p. 83-99.
8Lucia Jr T, Dial GD, Marsh WE. Lifetime reproductive performance in female pigs having distinct reasons for removal. Livest Prod Sci. 2000;63:213-22.
9Tomes GK, Nielson HE. Factors affecting reproductive efficiency of the breeding herd. In: Cole DJA, Foxcroft G, editors. Control of pig reproduction. London: Butterworth Scientific; 1982. p. 527-9.
10Foxcroft G, Beltranena E, Patterson J, Williams N, Pizzarro G. Physiological limits to maximizing sow productivity. In: London Swine Conference Proceedings. London, Ontario: Production at the leading edge; 2005. p. 29-46.
