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首页> 外文期刊>Ultrasound in Medicine and Biology >Ultrasonographic assessment of growth and estimation of birthweight in late gestation fetal sheep.
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Ultrasonographic assessment of growth and estimation of birthweight in late gestation fetal sheep.

机译：妊娠晚期胎儿绵羊生长的超声检查和出生体重的估计。

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摘要

Our aim was to identify which ultrasound parameters can be most accurately measured and best predict ovine fetal weight in late gestation. Singleton pregnancies were established using embryo transfer in 32 adolescent ewes, which were subsequently overnourished to produce fetuses of variable size (1720-6260 g). Ultrasound measurements at 126-133 days gestation were compared with fetal weight/biometry at late-gestation necropsy (n = 19) or term delivery (n = 13). Abdominal circumference (AC) and renal volume (RV) correlated best with physical measurements (r = 0.78-0.83) and necropsy/birth weight (r = 0.79-0.84). Combination of AC + RV produced an estimated fetal weight equation [Log EFW = 2.115 + 0.003 AC + 0.12 RV - 0.005 RV(2)] with highest adjusted R(2) (0.72) and lowest mean absolute/percentage prediction error (396-550 g/11.1%-13.2%). In conclusion, AC and RV are parameters of choice for assessment of late-gestation ovine fetal growth and can be used to estimate fetal weight with similar accuracy to human fetuses.
机译：我们的目的是确定可以最准确地测量哪些超声参数，并最好地预测妊娠后期的绵羊胎儿体重。使用胚胎移植在32头青春期母羊中建立单胎妊娠，随后将其过度营养以生产可变大小的胎儿（1720-6260 g）。将妊娠126-133天时的超声测量结果与妊娠晚期尸检（n = 19）或足月分娩（n = 13）时的胎儿体重/生物特征进行比较。腹围（AC）和肾体积（RV）与体格测量（r = 0.78-0.83）和尸检/出生体重（r = 0.79-0.84）最佳相关。 AC + RV的组合产生了估计的胎儿体重方程[Log EFW = 2.115 + 0.003 AC + 0.12 RV-0.005 RV（2）]，调整后的R（2）最大（0.72），平均绝对/百分比预测误差最低（396- 550克/11.1%-13.2%）。总之，AC和RV是评估妊娠晚期胎儿胎儿生长的选择参数，可用于估算胎儿体重，其准确性与人类胎儿相似。

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