title: The twin peak sign.
authors: Department of Radiology, Beth Israel Deaconess Medical Center, Boston, MA, USA. itrop@yahoo.com
authors: I
authors: I
authors: Trop
mesh_terms: D005260:Female; D005865:Gestational Age; D006801:Humans; D008297:Male; D010920:Placenta / Q000000981:diagnostic imaging*; D011247:Pregnancy; D012680:Sensitivity and Specificity; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic; D016216:Ultrasonography, Prenatal / Q000379:methods*