The duration of bleeding from a miscarriage is different for every woman, but the bleeding should stop within about two weeks in most cases.
Longer bleeding time could be a sign of incomplete miscarriage, meaning that tissue from the pregnancy is still present in the uterus. This poses a risk of infection, so be sure to report unusually long bleeding to a doctor in order to rule out complications.
Having a D & C could shorten the duration of vaginal bleeding, and some women may not even bleed at all following a D & C.
Sources:
Johnson, Nick, Mike Priestnall, Thelma Marsay, Paul Ballard, and Joan Watters. "A randomised trial evaluating pain and bleeding after a first trimester miscarriage treated surgically or medically." European Journal of Obstetrics & Gynecology and Reproductive Biology 1997. Accessed 2 Jan 2008.
Trinder, J., P. Brocklehurst, R. Porter, M. Read, S. Vyas, and L. Smith. "Management of miscarriage: expectant, medical, or surgical? Results of randomised controlled trial (miscarriage treatment (MIST) trial)." 27 May 2006 BMJ. Accessed 2 Jan 2008.
