23rd May 2025

A 43-year-old female presents to an endocrinology clinic with amenorrhoea for the last 4 years, weight gain, loss of strength and low mood.

A 43-year-old female presents to an endocrinology clinic with amenorrhoea for the last 4 years, weight gain, loss of strength and low mood. She had recently been started on a statin by her GP and been diagnosed with pre-diabetes. Her thyroid function tests, morning ACTH and cortisol levels were normal.  

What investigation should be done next to help diagnose the cause of this patient’s symptoms?

Select the SINGLE most appropriate option from the list below. Select ONE option only.