(1) The Alan Guttmacher Institute, http://www.agi-usa.org/pubs/fb_induced_abortion.html

(2) http://www.smartmoms.org

(3) Carlson, Bruce M. (1999). Human Embryology and Developmental Biology. Mosby, Inc.: St. Louis, MO.

(4) Costa, Marie (1991). Contemporary World Issues: Abortion. Santa Barbara, CA; ABC-CLIO.

(5) Hatcher, Robert A., MD, MPH, et al. (1998). Contraceptive Technology. New York: Ardent Media, Inc.

(6) Paul, Maureen, MD, MPH, et al. (1999). A Clinician's Guide to Medical and Surgical Abortion. Philadelphia, PA: Churchill Livingstone.

(7) Speroff, Leon, M.D. and Philip D. Darney, M.D., M.Sc (1997). A Clinical Guide for Contraception. Baltimore, MD: Williams & Wilkins.

(8) http://www.mydr.com.au/default.asp?article=2946

(9) Chalker, Rebecca and Carol Downer (1992). A Woman's Book of Choices. New York: Four Walls Eight Windows.

(10) Planned Parenthood, http://www.plannedparenthood.org

(11) The Bantam Medical Dictionary. New York: Bantam Books, 2000.

(12) http://www.cliniciansforchoice.org

(13) http://www.earlyoptions.org