Factors affecting duration of the expulsive stage of parturition and piglet birth intervals in sows with uncomplicated, spontaneous farrowings
Factors affecting duration of the expulsive stage of parturition and piglet birth intervals in sows with uncomplicated, spontaneous farrowings
复制标题
DOI：
10.1016/j.theriogenology.2005.03.017
复制
发表时间：
2005-10-15
期刊：
影响因子：
2.8
通讯作者：
Taverne, MAM
中科院分区：
文献类型：
--
作者：
van Dijk, AJ;van Rens, BTTM;Taverne, MAM
现代养猪业仍然面临着高围产期仔猪损失，这主要是由于与仔猪排出进展相关的因素。因此，本研究的目的是确定母猪和仔猪因素影响的持续时间的分娩和仔猪出生间隔的自然分娩母猪来自五个不同的品种。共调查了211窝。品种对排粪期的持续时间有显著影响，大白色×梅山F2代排粪期最短，荷兰长白猪排粪期最长。胎次对分娩排出期的持续时间无影响，但胎次增加（P < 0.01）、每窝死胎数增加（P < 0.05）和妊娠期缩短（P < 0.05，与胎次无关）均导致分娩排出期的持续时间延长。仔猪出生间隔与仔猪出生顺序的相对位置呈曲线关系，且仔猪出生间隔随出生体重的增加而增加（P < 0.001）。死产（P < 0.01）和后代（P < 0.05）仔猪的分娩间隔显著长于活产和前代仔猪。母猪和仔猪的因素影响持续时间的驱逐阶段和仔猪出生间隔在本研究中获得的结果有助于增加洞察（病理）生理方面的猪围产期死亡率。(c)2005年爱思唯尔公司All rights reserved.
Modern pig farming is still confronted with high perinatal piglet losses which are mainly contributed to factors associated with the progress of piglet expulsion. Therefore the aim of this study was to identify sow- and piglet factors affecting the duration of the expulsive stage of farrowing and piglet birth intervals in spontaneous farrowing sows originating from five different breeds. In total 211 litters were investigated. Breed affected duration of the expulsive stage significantly: the shortest duration was found in Large White x Meishan F2 crossbred litters and the longest duration in Dutch Landrace litters. No effect of parity on the duration of the expulsive stage was found. An increase in littersize (P < 0.01), an increase in number of stillborn piglets per litter (P < 0.05) and a decrease of gestation length (P < 0.05, independently of littersize) all resulted in an increased duration of the expulsive stage of farrowing. A curvilinear relationship between birth interval and rank (relative position in the birth order) of the piglets was found. Besides that, piglet birth intervals increased with an increasing birth weight (P < 0.001). Stillborn (P < 0.01) and posteriorly presented (P < 0.05) piglets were delivered after significantly longer birth intervals than livebom and anteriorly presented piglets. The results on sow- and piglet factors affecting duration of the expulsive stage and piglet birth intervals obtained in this study contribute to an increased insight into (patho) physiological aspects of perinatal mortality in pigs. (c) 2005 Elsevier Inc. All rights reserved.