A 39-year-old married man who has 3 children (ages 10, 8
and 5) presents with a history of loss of libido and impotence.
On examination apart from obesity there are no physical
He has retained secondary sexual characteristics.
Investigations reveal normal haematology, urea and
electrolytes and liver function tests.
Fasting Blood Sugar 6.1 mmol/L
TSH 3.1 mU/L (0.5-4)
Testosterone 5.4 nmol/L (9-35)
LH 24.6 U/L (1-10)
FSH 20.4 U/L (1-7)
Prolactin 320 mU/L (< 360)
Which of the following would you arrange in this patient?
Insulin tolerance test