How long does it typically take hypothalamic-pituitary-gonadal axis to recover without TRT for men with functional hypogonadism undergoing treatment for severe obesity?

How long does it typically take hypothalamic-pituitary-gonadal axis to recover without TRT for men with functional hypogonadism undergoing treatment for severe obesity?

• less than 6 months
• 6-12months
• 2-5
• may not recover
• Other