A threatened miscarriage is a condition that suggests a miscarriage might take place before the 20th week of pregnancy. Symptoms include vaginal bleeding and abdominal cramps.
Review Date 8/7/2016
Updated by: John D. Jacobson, MD, Professor of Obstetrics and Gynecology, Loma Linda University School of Medicine, Loma Linda Center for Fertility, Loma Linda, CA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.