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Validation of obstetric estimate of gestational age on US birth certificates.
Dietz PM, Bombard JM, Hutchings YL, Gauthier JP, Gambatese MA, Ko JY, Martin JA, Callaghan WM. Dietz PM, et al. Am J Obstet Gynecol. 2014 Apr;210(4):335.e1-335.e5. doi: 10.1016/j.ajog.2013.10.875. Epub 2013 Oct 29. Am J Obstet Gynecol. 2014. PMID: 24184397 Free PMC article.