Wongwaipisitkul Napatsawan, Chanpanitkit Yanwarut, Vaewburt Natthacha, Phattarathianchai Piyakorn, Tummaruk Padet
Department of Obstetrics, Gynaecology, and Reproduction, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, 10330, Thailand.
Centre of Excellence in Swine Reproduction, Chulalongkorn University, Bangkok, 10330, Thailand.
Anim Biosci. 2024 Jan;37(1):39-49. doi: 10.5713/ab.23.0169. Epub 2023 Aug 30.
The present study was performed to determine risk factors associated with the frequency of farrowing assistance in hyperprolific sows in a tropical environment and to investigate the impacts of farrowing assistance on piglet colostrum consumption and sow colostrum yield.
Farrowing data from 352 Landrace×Yorkshire crossbred sows and 5,554 piglets in five commercial swine herds in Thailand were investigated. The sows were classified according to parity numbers: 1 (n = 72), 2 to 4 (n = 128), 5 to 6 (n = 84), and ≥7 (n = 68) and the total number of piglets born per litter (TB): 10 to 13 (n = 90), 14 to 16 (n = 117), and ≥17 (n = 145). The incidence of farrowing assistance and associated parameters were investigated.
The TB and farrowing duration averaged 15.8±0.2 and 279.9±11.2 min, respectively. The percentage of sows that required farrowing assistance was 29.8% and varied among herds from 5.7% to 53.3% (p<0.001). The percentage of piglets born after birth assistance using manual intervention was 8.4%. Sows with parity numbers 1 and 2 to 4 had a lower frequency of farrowing assistance than sows with parity numbers ≥7 (p<0.01). The colostrum yield of sows that required farrowing assistance did not differ from sows that farrowed without assistance (5.3±0.2 and 5.1±0.1 kg; p = 0.288); however, the colostrum consumption of piglets born from sows that required farrowing assistance was lower than those born from sows that farrowed without assistance (302.2±15.7 and 354.2±5.6 g; p<0.001). Blood oxygen saturation of the piglets born after birth assistance tended to be lower than the piglets that farrowed without birth assistance (87.8%±1.3% vs 90.4%±0.4%; p = 0.054).
The frequency of farrowing assistance in sows varied among herds and was influenced by parity number. The piglets born after receiving birth assistance should receive special care to improve their blood oxygen saturation and enhance colostrum intake.
本研究旨在确定热带环境下高产母猪产仔助产频率的相关风险因素，并调查产仔助产对仔猪初乳摄入量和母猪初乳产量的影响。
对泰国五个商业猪群中352头长白×约克夏杂交母猪和5554头仔猪的产仔数据进行了调查。母猪按胎次分类：第1胎（n = 72）、第2至4胎（n = 128）、第5至6胎（n = 84）和≥7胎（n = 68），并按每窝出生仔猪总数（TB）分类：10至13头（n = 90）、14至16头（n = 117）和≥17头（n = 145）。调查了产仔助产的发生率及相关参数。
TB和产仔持续时间的平均值分别为15.8±0.2和279.9±11.2分钟。需要产仔助产的母猪比例为29.8%，不同猪群间差异较大，从5.7%至53.3%（p<0.001）。经人工干预出生后助产的仔猪比例为8.4%。第1胎和第2至4胎的母猪产仔助产频率低于胎次≥7的母猪（p<0.01）。需要产仔助产的母猪初乳产量与无需助产的母猪无差异（5.3±0.2和5.1±0.1千克；p = 0.288）；然而，需要产仔助产的母猪所生仔猪的初乳摄入量低于无需助产的母猪所生仔猪（302.2±15.7和354.2±5.6克；p<0.001）。出生后助产的仔猪血氧饱和度往往低于无需出生助产的仔猪（87.8%±1.3%对90.4%±0.4%；p = 0.054）。
母猪产仔助产频率因猪群而异，并受胎次影响。接受出生后助产的仔猪应得到特别护理，以提高其血氧饱和度并增加初乳摄入量。
