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单边和双边牛双胞胎胎胎的特征

Jørgen Steen Agerholm¹, Lene Elisabeth Buelund², Katrine Graff¹

¹Section for Reproduction and Obstetrics, Department of Veterinary Clinical Sciences, University of Copenhagen, Taastrup, Denmark.

Reproduction in domestic animals = Zuchthygiene

|July 1, 2024

概括

在牛中单边双胞胎怀孕有更高的堕胎风险. 这项研究没有发现最外围的胎儿生长迟缓的证据,这表明其他因素导致这种风险增加.

科学领域:

兽医科学兽医科学兽医科学
生殖生物学生殖生物学
动物科学动物科学

背景情况:

双胞胎怀孕在牛增加堕胎的风险,相比单个怀孕.
在单边双胞胎怀孕 (两个胎儿在一个角) 中,堕胎风险明显高于双边 (每个角一个胎儿).
单边双胞胎怀孕中堕胎风险增加的原因尚不清楚,可能与胎儿营养不良有关.

研究的目的:

调查牛单边双胞胎怀孕中更高堕胎风险的原因.
为了确定胎儿营养不良,以增长迟缓为证,是否有助于单边双胞胎怀孕中堕胎.

主要方法:

一项屠宰场研究测量了来自65头双胞胎孕牛的胎儿.
在单边双胞胎怀孕中,胎儿的体重和甲手腕腹膜长度的比较.
鉴定并分析了屠宰前胎儿死亡率的病例.

主要成果:

在单边双胞胎怀孕中,在最外围和中心位置的胎儿之间没有发现体重或甲手腕隔膜长度的显著差异.
最外围胎儿的增长迟缓并未被证实是导致堕胎风险增加的原因.
观察到4例胎儿死亡;在3例中,两个胎儿都死了,大小相似,而在一个较年轻的胎儿的情况下,只有一个显示死亡迹象.

结论:

最外围胎儿的增长迟缓并不能解释单边牛双胞胎怀孕中更高的流产风险.
单边双胞胎怀孕中堕胎率增加的根本原因需要进一步调查.
在双胞胎怀孕中,胎儿死亡可能发生在两个胎儿受影响的情况下,或者在某些情况下,单方面发生.

关键词:

堕胎堕胎堕胎堕胎堕胎堕胎堕胎堕胎这种情况是anastomoses的.胎儿的损失胎儿的损失弗里马丁是自由的化化化胎盘胎盘胎盘胎盘

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