1. Diagnosis of fetal abnormalities at the 10–14 week scan;Souka;Ultrasound Obstet Gynaecol,1997
2. Ultrasound screening for fetal abnormalities in the first trimester;Chitty;Prenatal Diagn,1997
3. Ultrasound diagnosis of congenital anomalies in early pregnancy;Weissman,1996
4. Early pregnancy screening for fetal abnormalities;Economides;Ultrasound Obstet Gynecol,1999
5. The prevalence of non-viable prgnancy at 10–13 weeks of gestation;Pandya;Ultrasound Obstet Gynecol,1996