This case investigates the difference between heterotopic pregnancy vs. intrauterine pregnancy, a topic that more emergency medicine physicians will face as the rates of assisted reproductive technologies increase. Throughout the case, the pathognomonic "Ring of Fire" is discussed, as is seen on the transvaginal ultrasound, and its reliability is assessed.
Keywords: bleeding in pregnancy; colored flow doppler ultrasound; corpus luteal cyst; heterotopic pregnancy; heterotopic pregnancy (hp); pregnancy; ring of fire.
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