Obstet Gynecol. 2011 Apr;117(4):837-43.
Creanga AA, Shapiro-Mendoza CK, Bish CL, Zane S, Berg CJ, Callaghan WM.
In this paper the authors show that over the time period studied ectopic pregnancy mortality ratio declined by 56.6%, from 1.15 to 0.50 per 100,000 live births. Mortality was significantly higher in African-American and older women.