ACOG Practice Bulletin: Screening for Fetal Chromosomal Anomalies, Number 77, January 2007, Reaffirmed 2013.
Ghidini, A. Diagnostic Amniocentesis, http://www.UpToDate.com accessed July 12, 2015.
Lockwood, C. Guidelines for Perinatal Care. 7th ed. AAP and ACOG. 2012.
ACOG Practice Bulletin: Invasive Prenatal Testing for Aneuploidy, Number 88, Dec. 2007, Reaffirmed 2014.
ACOG Practice Bulletin: Management of Alloimmunization During Pregnancy, Number 75, August 2006, Reaffirmed 2012.
ACOG Practice Bulletin: Hemoglobinopathies in Pregnancy, Number 78, January 2007, Reaffirmed 2013.
ACOG Patient Education Pamphlet: Diagnostic Tests for Birth Defects, January 2015.