Gynaecology & Obstetrics A middle aged female presents with increasing visual loss, breast enlargement and irregular menses. Investigation of choice would be: A S. calcitonin B S. prolactin C S. hemoglobin concentration D S. calcium 💡 Explanation A middle aged female presents with increasing visual loss, breast enlargement and irregular menses. Investigation of choice would be: ✓ Correct Answer: B. S. prolactin