Spontaneous Heterotopic Pregnancy as an Uncommon Clinical Problem.

Background: Heterotopic pregnancy refers to the simultaneous coexistence of an intrauterine and extrauterine pregnancy. In natural conception it is very rare, with a rising incidence in patients undergoing assisted reproduction technologies. It presents a serious diagnostic problem which is often misdiagnosed. Currently, there are no standard protocols for the treatment and diagnosis of heterotopic pregnancy.

Methods: Two rare cases of spontaneous heterotopic pregnancy are presented.

Results: The first patient had a complete abortion upon which an extrauterine pregnancy was detected. The second patient, after an extrauterine pregnancy removal, progressed with an intrauterine pregnancy until full term and it ended with the delivery of a healthy infant.

Conclusions: Two demonstrated cases underscore that whenever abnormal adnexal findings are presented and the beta-hCG blood test is positive, the possibility of a heterotopic pregnancy should be suspected.