Number of pregnancies that end in miscarriage, according to various sources:
- "As many as 30 percent" -- PDR Family Guide to Women's Health
- "20 percent" -- Medical College of Georgia Web site
- "about 15 percent to 20 percent" -- www.medem.com
- "One in eight [13 percent]... in the first trimester" -- Anthony V. Indovina, D.O. at www.glfamily.com
Ravensong's two-thirds figure seems to be an estimate that takes into account all those pregnancies the mother never even knew about. I have no idea at all where the 90-percent figure came from.