Interstitial ectopic pregnancies are very rare, however, they are extremely dangerous. Treatment consists of either surgical or medical management. This patient presented with no prior pregnancies, an inappropriately rising b-hCG, and eventually had ultrasound findings consistent with interstitial ectopic pregnancy. She was seen through the Emergency Department and had no insurance. She strongly desired to avoid surgery, and was successfully given a multi-dose regimen of methotrexate. Contraindication to methotrexate management includes an inability to follow-up, so a close therapeutic alliance was maintained to enable safe resolution of this case. She has since successfully carried an uncomplicated intrauterine pregnancy to term.
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