External testosterone changes signalling
Testosterone taken from outside the body can suppress pituitary signals that normally stimulate the testes. This can reduce intratesticular testosterone and sperm production, sometimes markedly.
Recovery is variable
Sperm production may recover after treatment stops, but the time course varies and recovery is not guaranteed for every person. Age, duration of exposure, baseline fertility and other health factors can matter.
Discuss future plans before starting
Guidelines advise against starting testosterone in men planning fertility in the near term. A fertility specialist or endocrinologist can assess the cause of symptoms and discuss appropriate alternatives without AEVLI recommending a regimen.
Useful information to track
- Current and future fertility goals
- Baseline assessment and semen analysis if arranged
- All hormones, anabolic agents and supplements
- Specialist plan and follow-up dates
Sources
Reviewed against the following official guidance and primary evidence. Product information and clinical guidance can change.