Routine 36-Week Scan for Predicting Small-for-Gestational-Age Neonates
Author Information
Author(s): Adjahou S., Syngelaki A., Nanda M., Papavasileiou D., Akolekar R., Nicolaides K. H.
Primary Institution: Fetal Medicine Research Institute King's College Hospital London UK
Hypothesis
The study aims to compare the predictive performance of routine ultrasound examinations at different gestational ages for identifying small-for-gestational-age (SGA) neonates.
Conclusion
Routine third-trimester ultrasound screening for SGA neonates is most effective when performed at 35-36 weeks' gestation and combined with maternal risk factors.
Supporting Evidence
- Screening at 35-36 weeks detects 85% of SGA neonates born at any time after assessment.
- Using EFW <40th percentile improves detection rates for SGA neonates.
- Combining maternal factors with EFW significantly enhances predictive performance.
Takeaway
Doctors can better predict if a baby is too small for its age by doing an ultrasound at 36 weeks instead of earlier, especially if they also consider the mother's health.
Methodology
This was a retrospective analysis of prospectively collected data from women with singleton pregnancies who underwent routine ultrasound examinations at two different gestational ages.
Potential Biases
Potential bias due to the non-randomized design and the availability of scan results to clinicians.
Limitations
The study was not randomized, and the results of the scans were available to obstetricians, which may have influenced outcomes.
Participant Demographics
Women with singleton pregnancies, with varying maternal ages, weights, and ethnic backgrounds.
Statistical Information
P-Value
<0.0001
Confidence Interval
95% CI provided for various outcomes
Statistical Significance
p<0.0001
Digital Object Identifier (DOI)
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