A 32-year-old woman presents with fatigue. Hb is 88 g/L, MCV 72 fL and ferritin 6 µg/L. She has heavy menstrual periods but no red-flag gastrointestinal symptoms. What is the most appropriate initial management in general practice?AReassure and repeat full blood count in 6 monthsBStart oral ferrous sulfate and investigate potential causes including menstrual blood lossCArrange urgent colonoscopy as the first stepDPerform bone marrow biopsyEStart erythropoietin therapyCheck my answer