Diagnostic dilemma in ovarian pregnancy: a case series.

Ovarian pregnancy is a rare form of ectopic pregnancy but it is the most common type of nontubal ectopic pregnancy. Many times it is operated with a misdiagnosis of ruptured tubal ectopic pregnancy or hemorrhagic corpus luteum. The high resolution transvaginal ultrasonography is a valuable tool for diagnosis of ectopic pregnancy but ovarian pregnancy still remains a diagnostic problem and a continuous challenge to the gynecologist. The correct diagnosis is made at the time of surgery and confirmation is by histopathological report. Here we report three cases of primary ovarian ectopic pregnancies, consistent with the Spiegelberg's criteria. Out of this, two cases have corroboration of ovarian ectopic pregnancy with use of intrauterine contraceptive device and one case by chance without any preexisting risk factors, probably due to interference in the release of ovum from the follicle. In all the three cases, emergency laparotomy was done for ruptured tubal ectopic pregnancy and the diagnosis of ruptured primary ovarian pregnancy was made at the time of surgery, this was subsequently confirmed by histopathology report. In the era where wider usage of intrauterine devices, ovulatory drugs and assisted reproductive techniques are rife, there is a possibility of an increase in the incidence of this rare entity, so ovarian ectopic pregnancy should be kept in mind as a possibility. Thereby early diagnosis by high resolution transvaginal ultrasound and laparoscopy can decrease the risk of complications like rupture, secondary implantation, hemorrhagic shock and maternal mortality.