title: Predicting pregnancy failure in 'empty' gestational sacs.
authors.affiliation: Scottsdale Medical Imaging Ltd, PO Box 1573, Scottsdale, AZ 85252, USA. nyberg@u.washington.edu
authors.forename: D A
authors.initials: DA
authors.lastname: Nyberg
authors.forename: R A
authors.initials: RA
authors.lastname: Filly
mesh_terms: D000022:Abortion, Spontaneous / Q000000981:diagnostic imaging*; D005314:Embryonic and Fetal Development; D005260:Female; D006801:Humans; D011237:Predictive Value of Tests; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D012016:Reference Values; D012680:Sensitivity and Specificity; D016216:Ultrasonography, Prenatal / Q000592:standards*