Hormone panel
FSH
Also called Follicle-stimulating hormone · measured in IU/L
What it measures
The pituitary hormone that drives sperm production in men.
Why it is tracked
Measured alongside LH to locate the origin of a hormonal problem, and relevant to any discussion about fertility before starting testosterone therapy.
What a provider considers
- Suppressed by exogenous testosterone
- Elevated where testicular function is impaired
- Relevant to fertility planning
Reference ranges vary between laboratories and a single result rarely means much on its own. Interpretation depends on your symptoms, your other markers and the trend over time — which is what your provider reviews.