Back to matchesWe found a matchYour institution may have rights to this item. Sign in to continue.TitleUltrasonographic measurement of the yolk sac.AuthorsCROOIJ, M. J.; WESTHUIS, M.; SCHOEMAKER, J.; EXALTO, N.PublicationBJOG: An International Journal of Obstetrics & Gynaecology, 1982, Vol 89, Issue 11, p931ISSN1470-0328Publication typeArticleDOI10.1111/j.1471-0528.1982.tb05060.x