A 40-year-old lady presents with hot flushes and sweating. Her mother had early menopause. What is the most appropriate investigation? A. Testosterone B. Serum oestrogen levels C. Serum follicle stimulating hormone level D. Corticosteroid levels E. Trans-vaginal ultrasound scan
C as a serum FSH of 30 mIU or more with a history of 1 year or more of amenorrhea is confirmatory for menopause