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A 20-year-old woman presents with right-sided severe pain radiating to the shoulder tip. She has a history of two months of amenorrhea. The most likely cause is:

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A 20-year-old woman presents with right-sided severe pain radiating to the shoulder tip. She has a history of two months of amenorrhea. The most likely cause is: Answer: Ectopic pregnancy

Amenorrhea combined with severe unilateral abdominal pain and referred shoulder-tip pain strongly suggests a ruptured or leaking ectopic pregnancy with intraperitoneal bleeding. Diaphragmatic irritation by blood can produce the characteristic referred pain felt at the shoulder tip.

Question context

This question is part of 🧫 Biotechnology within the broader 🧬 Medical Science subject and appears in the SPSC – Sindh Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.