Spontaneous Bilateral Ectopic Pregnancy in a Patient With Endometriosis

Background Bilateral ectopic pregnancies (EPs) occur in 1 of 200,000 pregnancies. Evidence suggests that endometriosis is an independent risk factor for unilateral EPs. However, the link between endometriosis and bilateral EPs has not been established. Case Report We report a case of a bilateral EP in a patient with endometriosis. The patient was initially misdiagnosed with the unilateral EP. Why Should an Emergency Physician Be Aware of This? Although rare, bilateral EP should be on a differential diagnosis in a pregnant patient presenting with abdominal pain or vaginal bleeding. This includes patients presenting with worsening symptoms after the recent surgery for the unilateral EP. Endometriosis as a risk factor for bilateral EP cannot be established based on a single report, but such a report should raise awareness of the issue.