Citations

1. American College of Obstetricians and Gynecologists (2004). ACOG issues position on first-trimester screening methods. Available online: http://www.acog.org/from_home/publications/press_releases/nr06-30-04.cfm.

2. Caughey AB, et al. (2006). Chorionic villus sampling compared with amniocentesis and the difference in the rate of pregnancy loss. Obstetrics and Gynecology, 108(3): 612–616.

3. Cunningham FG, et al. (2001). Ultrasound and doppler. In Williams Obstetrics, 21st ed., pp. 1111–1139. New York: McGraw-Hill.

4. Cunningham FG, et al. (2001). Prenatal diagnosis and fetal therapy. In Williams Obstetrics, 21st ed., pp. 973–1004. New York: McGraw-Hill.

5. Seeds JW (2004). Diagnostic mid trimester amniocentesis: How safe? American Journal of Obstetrics and Gynecology, 191: 608–616.