Abstract
Original language | English |
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Pages (from-to) | 1588-1595 |
Number of pages | 8 |
Journal | Ultrasound in Medicine & Biology |
Volume | 37 |
Issue number | 10 |
Early online date | 6 Aug 2011 |
DOIs | |
Publication status | Published - Oct 2011 |
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Ultrasonographic assessment of growth and estimation of birthweight in late gestation fetal sheep. / Carr, David J; Aitken, Raymond P; Milne, John S; David, Anna L; Wallace, Jacqueline M.
In: Ultrasound in Medicine & Biology, Vol. 37, No. 10, 10.2011, p. 1588-1595.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Ultrasonographic assessment of growth and estimation of birthweight in late gestation fetal sheep
AU - Carr, David J
AU - Aitken, Raymond P
AU - Milne, John S
AU - David, Anna L
AU - Wallace, Jacqueline M
PY - 2011/10
Y1 - 2011/10
N2 - 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 RV2] with highest adjusted R2 (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.
AB - 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 RV2] with highest adjusted R2 (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.
U2 - 10.1016/j.ultrasmedbio.2011.06.016
DO - 10.1016/j.ultrasmedbio.2011.06.016
M3 - Article
VL - 37
SP - 1588
EP - 1595
JO - Ultrasound in Medicine & Biology
JF - Ultrasound in Medicine & Biology
SN - 0301-5629
IS - 10
ER -