1. Ectopic pregnancy in the United States, 1970–1986;Lawson;MMWR Morb Mortal Wkly Rep,1989
2. Ectopic pregnancy in the United States, 1988–1989;Centers for Disease Control and Prevention;MMWR Morb Mortal Wkly Rep,1992
3. Diagnosis of ectopic pregnancy by vaginal ultrasonography in combination with a discriminatory serum HCG level of 1000 IU/1 (IRP);Cacciatore;Br J Obstet Gynaecol,1990
4. Ectopic pregnancy and laparoscopy: review of 1197 patients treated by salpingectomy or salpingotomy;Maymon;Eur J Obstet Gynecol Reprod Biol,1995
5. Fertility after ectopic pregnancy in relation to type of surgery and histological findings;Korell;Fertilität,1997