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Ectopic pregnancy — RCPSC EM MCQ

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ModerateOB/GYN emergenciesEctopic pregnancyRCPSC EM

A 27-year-old at seven weeks' gestation presents with unilateral pelvic pain and spotting. Blood pressure is 108/70 mmHg, heart rate is 94/min and abdomen is mildly tender. Serum beta-hCG is 2,800 IU/L and transvaginal ultrasound shows no intrauterine pregnancy with a small right adnexal mass. What is the most likely diagnosis?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: C — Unruptured ectopic pregnancy

Pregnancy of unknown location above the discriminatory range with adnexal mass and pain is ectopic pregnancy until proven otherwise. Haemodynamic stability permits urgent gynaecology assessment rather than immediate laparotomy.

Reference: SOGC ectopic pregnancy guidance; Canadian emergency medicine textbooks