通过超声检查评估正常、高危和克隆妊娠母牛的胎儿健康状况。
Assessment of fetal well-being in cattle by ultrasonography in normal, high-risk, and cloned pregnancies.
作者信息
Buczinski Sébastien, Fecteau Gilles, Lefebvre Réjean C, Smith Lawrence C
机构信息
Département des Sciences Cliniques, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec.
出版信息
Can Vet J. 2011 Feb;52(2):136-41.
This study determined ultrasonographic parameters of fetuses and uterine adnexa in late pregnancy in normal, cloned, and high-risk pregnancies in relation to perinatal and neonatal outcome. Ten cows with normal pregnancies (CONTROL, mean pregnancy length 273 d), 10 sick cows with potentially compromised pregnancies (HIGH-RISK, mean pregnancy length 267 d), and 10 heifers with cloned pregnancies (CLONED, mean pregnancy length 274 d) were examined at more than 260 d of gestation. There was no difference in mean fetal heart rates among the groups. The cloned calves were heavier (57 ± 8 kg) than calves from CONTROL group (36 ± 7 kg), and calves from HIGH-RISK group (37 ± 13 kg) (P = 0.003). The diameter of the thoracic aorta was positively correlated (R = 0.62) with fetal birth weight in the CONTROL group (P = 0.01). Fetal activity was not associated with survival. The results suggest that transabdominal ultrasonographic assessment of the fetal well-being may serve as a potential tool for evaluation of the fetoplacental unit.
本研究确定了正常妊娠、克隆妊娠和高危妊娠晚期胎儿及子宫附件的超声参数，并将其与围产期和新生儿结局相关联。对10头正常妊娠奶牛（对照组，平均妊娠时长273天）、10头妊娠可能受到影响的患病奶牛（高危组，平均妊娠时长267天）和10头克隆妊娠的小母牛（克隆组，平均妊娠时长274天）在妊娠超过260天时进行了检查。各组间平均胎儿心率无差异。克隆犊牛（57±8千克）比对照组犊牛（36±7千克）和高危组犊牛（37±13千克）更重（P = 0.003）。在对照组中，胸主动脉直径与胎儿出生体重呈正相关（R = 0.62）（P = 0.01）。胎儿活动与生存无关。结果表明，经腹超声评估胎儿健康状况可能成为评估胎儿-胎盘单位的潜在工具。
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