Research Article
Accuracy of measurements of crown-rump length and biparietal diameter made by inexperienced operators using a real-time scanner.
Br Med J (Clin Res Ed) 1981; 282 doi: https://doi.org/10.1136/bmj.282.6281.2011 (Published 20 June 1981) Cite this as: Br Med J (Clin Res Ed) 1981;282:2011This is a PDF-only article. The first page of the PDF of this article appears above.