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Three control groups were used: (i) sows that farrowed spontaneously before 114\u00a0day of gestation (<jats:styled-content style=\"fixed-case\">CONT<\/jats:styled-content> &lt;114); (ii) sows that spontaneously farrowed at \u2265114\u00a0day of gestation (<jats:styled-content style=\"fixed-case\">CONT<\/jats:styled-content> \u2265114); (iii) sows that farrowed at \u2265114\u00a0day with cloprostenol treatment (<jats:styled-content style=\"fixed-case\">CONTCLOPR<\/jats:styled-content>). Other sows were treated with altrenogest (Regumate<jats:sup>\u00ae<\/jats:sup>) for 3\u00a0days (days 111, 112 and 113 of gestation): one group gave birth spontaneously (<jats:styled-content style=\"fixed-case\">ALT<\/jats:styled-content>) and the other group received altrenogest until day 113 and cloprostenol on day 114 (<jats:styled-content style=\"fixed-case\">ALTCLOPR<\/jats:styled-content>). There were no differences (p\u00a0&gt;\u00a00.05) in farrowing duration, <jats:styled-content style=\"fixed-case\">BW<\/jats:styled-content>, coefficient of variation (<jats:styled-content style=\"fixed-case\">CV<\/jats:styled-content>) of <jats:styled-content style=\"fixed-case\">BW<\/jats:styled-content>, stillborn piglets, mummified foetuses, percentage of light piglets and survival until Day 3 between sows with and without cloprostenol treatment, in both control (<jats:styled-content style=\"fixed-case\">CONT<\/jats:styled-content> \u2265114 vs <jats:styled-content style=\"fixed-case\">CONTCLOPR<\/jats:styled-content>) and altrenogest\u2010treated sows (<jats:styled-content style=\"fixed-case\">ALT<\/jats:styled-content> vs <jats:styled-content style=\"fixed-case\">ALTCLOPR<\/jats:styled-content>). Further comparisons were performed taking into account three groups: sows with early delivery (<jats:styled-content style=\"fixed-case\">CONT<\/jats:styled-content> &lt;114 \u2013 farrowing before 114\u00a0days of gestation; n\u00a0=\u00a056), sows with longer gestation (<jats:styled-content style=\"fixed-case\">CONT<\/jats:styled-content> \u2265114 \u2013 with and without cloprostenol treatment sows; n\u00a0=\u00a0103) and <jats:styled-content style=\"fixed-case\">ALT<\/jats:styled-content> sows (with and without cloprostenol treatment; n\u00a0=\u00a0105). Gestation length of <jats:styled-content style=\"fixed-case\">CONT<\/jats:styled-content> \u2265114 and <jats:styled-content style=\"fixed-case\">ALT<\/jats:styled-content> sows was similar (p\u00a0&gt;\u00a00.05), but higher than in <jats:styled-content style=\"fixed-case\">CONT<\/jats:styled-content> &lt;114 sows. There were no differences (p\u00a0&gt;\u00a00.05) between groups in farrowing duration, <jats:styled-content style=\"fixed-case\">CV<\/jats:styled-content> of <jats:styled-content style=\"fixed-case\">BW<\/jats:styled-content>, and percentages of stillborn piglets and mummified foetuses. Sows of <jats:styled-content style=\"fixed-case\">CONT<\/jats:styled-content> &lt;114 group had a larger litter size and a lower <jats:styled-content style=\"fixed-case\">BW<\/jats:styled-content> than sows of the other two groups (p\u00a0&lt;\u00a00.05). Sows of <jats:styled-content style=\"fixed-case\">CONT<\/jats:styled-content> &lt;114 group had a higher percentage of lighter piglets and a lower piglet survival rate (p\u00a0&lt;\u00a00.05) than <jats:styled-content style=\"fixed-case\">ALT<\/jats:styled-content> sows. In conclusion, altrenogest treatment proved to be an efficient method to avoid early parturition in 3\u20135 parity sows resulting in heavier piglets at birth.<\/jats:p>","DOI":"10.1111\/rda.12085","type":"journal-article","created":{"date-parts":[[2012,9,21]],"date-time":"2012-09-21T10:53:15Z","timestamp":1348224795000},"page":"390-395","source":"Crossref","is-referenced-by-count":16,"title":["Altrenogest Treatment Associated with a Farrowing Induction Protocol to Avoid Early Parturition in Sows"],"prefix":"10.1111","volume":"48","author":[{"given":"TS","family":"Gaggini","sequence":"first","affiliation":[{"name":"Setor de Su\u00ednos, Faculdade de Veterin\u00e1ria Universidade Federal do Rio Grande do Sul Porto Alegre Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J","family":"Perin","sequence":"additional","affiliation":[{"name":"Setor de Su\u00ednos, Faculdade de Veterin\u00e1ria Universidade Federal do Rio Grande do Sul Porto Alegre Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"LS","family":"Arend","sequence":"additional","affiliation":[{"name":"Setor de Su\u00ednos, Faculdade de Veterin\u00e1ria Universidade Federal do Rio Grande do Sul Porto Alegre Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"ML","family":"Bernardi","sequence":"additional","affiliation":[{"name":"Departamento de Zootecnia, Faculdade de Agronomia Universidade Federal do Rio Grande do Sul Porto Alegre Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"I","family":"Wentz","sequence":"additional","affiliation":[{"name":"Setor de Su\u00ednos, Faculdade de Veterin\u00e1ria Universidade Federal do Rio Grande do Sul Porto Alegre Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"FP","family":"Bortolozzo","sequence":"additional","affiliation":[{"name":"Setor de Su\u00ednos, Faculdade de Veterin\u00e1ria Universidade Federal do Rio Grande do Sul Porto Alegre Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2012,9,21]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.2527\/jas.2005-775"},{"key":"e_1_2_8_3_1","first-page":"390","article-title":"Field trial to determine the impact of providing additional care to litters on weaning weight of pigs","volume":"72","author":"Dewey CE","year":"2008","journal-title":"Can J Vet Res"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.2460\/javma.2000.217.79"},{"key":"e_1_2_8_5_1","unstructured":"EdwardsM 2010:Review of weaning age effects on weaned pig performance. 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