DOI: 10.1055/s-00000009

American Journal of Perinatology

References

Westin M, Saltvedt S, Bergman G. , et al.
Routine ultrasound examination at 12 or 18 gestational weeks for prenatal detection of major congenital heart malformations? A randomised controlled trial comprising 36,299 fetuses.

BJOG 2006;
113 (06) 675-682

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