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Updated: Jan 25, 2026

Fetal Echocardiography and Pulsed-wave Doppler Ultrasound in a Rabbit Model of Intrauterine Growth Restriction
Published on: June 29, 2013
Timing of Delivery in Pregnancies Complicated by Suspected Fetal Growth Restriction without Doppler Abnormalities
Beth L Pineles1, Sarah Crimmins1, Ozhan Turan1
1Department of Obstetrics and Gynecology and Reproductive Sciences, University of Maryland Medical Center, Baltimore, Maryland.
Objective:
This study aimed to identify the optimal gestational age for delivery of pregnancies complicated by fetal growth restriction (FGR) without Doppler abnormalities.
Study Design:
Cases of FGR (ultrasound-estimated fetal weight less than the 10th or abdominal circumference less than the 5th percentile for gestational age) without fetal Doppler abnormalities were identified from a fetal ultrasound database. The primary outcome was a composite of perinatal mortality and morbidity. The risk of the primary outcome for each gestational age was compared with pregnancies delivered at 390/7 to 406/7 weeks. Odds ratios were adjusted for potential confounders.
Results:
The analysis included 1,024 pregnancies. FGR was identified at a median of 235/7 weeks (range: 20-42 weeks). Four cases of fetal death (234/7-376/7 weeks) and no neonatal deaths were included. The primary outcome occurred in 209 patients (20.4%). This was greater for patients delivered at less than 37 weeks' gestation than for those delivered at or after 39 weeks' gestation, with no increased risk after 40 weeks.
Conclusion:
Among pregnancies complicated by suspected FGR without Doppler abnormalities, delivery at 39 weeks is safe with no difference in perinatal outcomes from 37 to 42 weeks.
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