OverviewA threatened miscarriage or spontaneous abortion occurs in approximately 10% of pregnancies between 7 and 12 weeks of gestation. Symptoms include vaginal bleeding, abdominal cramps, and low back pain.
Update Date 11/8/2012
Updated by: Susan Storck, MD, FACOG, Chief, Eastside Department of Obstetrics and Gynecology, Group Health Cooperative of Puget Sound, Bellevue, Washington; Clinical Teaching Faculty, Department of Obstetrics and Gynecology, University of Washington School of Medicine. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, David R. Eltz, Stephanie Slon, and Nissi Wang.