missed labor

n.
  1. A condition in which a pregnant woman experiences uterine contractions at the normal term, but the contractions soon stop, and the fetus is retained, usually lifeless, within the uterus for an indefinite period.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.