1. Prenatal diagnosis;Evans,1998
2. Invasive procedures for prenatal diagnosis;Drugan,2002
3. Principles of screening;Evans,2002
4. Screening for aneuploidy;Evans,1999
5. Evans MI, Dvorin E, Bui TH, O'Brien JE. Serum screening for chromosome abnormalities. In: Sciarra J, editor. Gynecology and obstetrics. Philadelphia: Lippincott Raven. [In press].