Prevention of reproductive disorders in sows.
Data collection related to production performances and health parameters was developed in 31 intensive pig farms in Portugal (from 100-800 sows each) in 1,580 of 10,000 sows over 7 yr (1985-1992). Using prospective surveys and subsequent preventive veterinary medicine programs in pig farms, we demonstrated the value of risk-factor analysis in the improvement of production performances: an increase in litter size from 9.15 piglets born/litter (sd 2.93) to 13.4 (sd 2.13); an increase in number of weaned piglets per sow per year: 15.73 (sd 1.93) to 20.46 (sd 1.92); and a decrease in returns to oestrus (25.3 to 2.3%).
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Instituto de Protecćão à Produção Agro-Alimentar, Largo da Academia Nacional das Belas Artes, Lisbon, Portugal.
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Madec
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Tillon
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JP
D000818:Animals; D005260:Female; D005500:Follow-Up Studies; D007247:Infertility, Female / Q000453:epidemiology / Q000517:prevention & control / Q000662:veterinary*; D010298:Parity; D011174:Portugal / Q000453:epidemiology; D011247:Pregnancy; D011256:Pregnancy Outcome / Q000453:epidemiology / Q000662:veterinary*; D011446:Prospective Studies; D012307:Risk Factors; D013552:Swine; D013553:Swine Diseases / Q000453:epidemiology / Q000517:prevention & control*