1. Ectopic pregnancy: a review;Dialani;Ultrasound Q,2004
2. Incidence and risk factors for ectopic pregnancy;Pisarska;Clin Obstet Gynecol,1999
3. Early diagnosis of ovarian pregnancy by ultrasound;Chang;Int J Gynaecol Obstet,2004
4. Three consecutive ipsilateral tubal pregnancies in a nulliparous African woman: the role of conservative treatment;Lema;Cent Afr J Med,1995
5. Second ipsilateral ectopic gestation after total salpingectomy: a case report;Adebamowo;Afr J Med Med Sci,2000