1. Ectopic pregnancy—United States, 1990–1992;MMWR,1995
2. Surveillance for ectopic pregnancy—United States, 1970–1989;Goldner;MMWR,1993
3. Epidemiology of repeat ectopic pregnancy;Skjeldestad;Obstet Gynecol,1998
4. Repeat ectopic pregnancy;Schoen;Obstet Gynecol,1975
5. Repeat ectopic pregnancy;Hallatt;Am J Obstet Gynecol,1975