Gaggini T S, Perin J, Arend L S, Bernardi M L, Wentz I, Bortolozzo F P
Setor de Suínos, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
Reprod Domest Anim. 2013 Jun;48(3):390-5. doi: 10.1111/rda.12085. Epub 2012 Sep 21.
This study investigated the effect of altrenogest treatment on the farrowing development of sows, and birth weight (BW) and piglet survival until the third day of life. Three control groups were used: (i) sows that farrowed spontaneously before 114 day of gestation (CONT <114); (ii) sows that spontaneously farrowed at ≥114 day of gestation (CONT ≥114); (iii) sows that farrowed at ≥114 day with cloprostenol treatment (CONTCLOPR). Other sows were treated with altrenogest (Regumate(®) ) for 3 days (days 111, 112 and 113 of gestation): one group gave birth spontaneously (ALT) and the other group received altrenogest until day 113 and cloprostenol on day 114 (ALTCLOPR). There were no differences (p > 0.05) in farrowing duration, BW, coefficient of variation (CV) of BW, stillborn piglets, mummified foetuses, percentage of light piglets and survival until Day 3 between sows with and without cloprostenol treatment, in both control (CONT ≥114 vs CONTCLOPR) and altrenogest-treated sows (ALT vs ALTCLOPR). Further comparisons were performed taking into account three groups: sows with early delivery (CONT <114 - farrowing before 114 days of gestation; n = 56), sows with longer gestation (CONT ≥114 - with and without cloprostenol treatment sows; n = 103) and ALT sows (with and without cloprostenol treatment; n = 105). Gestation length of CONT ≥114 and ALT sows was similar (p > 0.05), but higher than in CONT <114 sows. There were no differences (p > 0.05) between groups in farrowing duration, CV of BW, and percentages of stillborn piglets and mummified foetuses. Sows of CONT <114 group had a larger litter size and a lower BW than sows of the other two groups (p < 0.05). Sows of CONT <114 group had a higher percentage of lighter piglets and a lower piglet survival rate (p < 0.05) than ALT sows. In conclusion, altrenogest treatment proved to be an efficient method to avoid early parturition in 3-5 parity sows resulting in heavier piglets at birth.
本研究调查了烯丙孕素处理对母猪产仔发育、出生体重（BW）以及仔猪出生后第三天存活情况的影响。设置了三个对照组：（i）在妊娠114天前自然分娩的母猪（CONT <114）；（ii）在妊娠≥114天自然分娩的母猪（CONT ≥114）；（iii）在妊娠≥114天用氯前列醇处理后分娩的母猪（CONTCLOPR）。其他母猪在妊娠第111、112和113天用烯丙孕素（Regumate(®)）处理3天：一组自然分娩（ALT），另一组在第113天前接受烯丙孕素处理，第114天接受氯前列醇处理（ALTCLOPR）。在对照组（CONT ≥114与CONTCLOPR）和烯丙孕素处理组（ALT与ALTCLOPR）中，无论是否使用氯前列醇处理，母猪在产仔持续时间、BW、BW变异系数（CV）、死产仔猪、木乃伊化胎儿、轻体重仔猪百分比以及出生后第三天存活情况方面均无差异（p>0.05）。进一步比较考虑了三组：早产母猪（CONT <114 - 妊娠不足114天分娩；n = 56）、妊娠时间较长的母猪（CONT ≥114 - 使用和未使用氯前列醇处理的母猪；n = 103）和ALT组母猪（使用和未使用氯前列醇处理；n = 105）。CONT ≥114组和ALT组母猪的妊娠期长度相似（p>0.05），但高于CONT <114组母猪。在产仔持续时间、BW的CV、死产仔猪和木乃伊化胎儿百分比方面，各组之间无差异（p>0.05）。CONT <114组母猪的产仔数比其他两组母猪多，但BW较低（p<0.05）。CONT <114组母猪的轻体重仔猪百分比高于ALT组母猪，仔猪存活率低于ALT组母猪（p<0.05）。总之，烯丙孕素处理被证明是一种有效的方法，可避免3至5胎母猪早产，从而使出生仔猪体重更重。
