Age and duration of testosterone therapy predict time to return of sperm count after human chorionic gonadotropin therapy.
Level 4 - case-series / case-control
Retrospective single-arm cohort / case-series without an untreated control group
PubMed 27855957 · doi:10.1016/j.fertnstert.2016.10.004
What was done
A retrospective clinical study evaluated 66 men presenting to an academic male-infertility clinic with infertility following exogenous testosterone (T) use. Treatment consisted of T cessation combined with high-dose human chorionic gonadotropin (hCG) and selective estrogen receptor modulator (SERM) therapy. The primary outcome was achieving a total motile count (TMC) greater than 5 million sperm within 12 months.
What was found
Overall, 46 men (70%) achieved a TMC > 5 million sperm within 12 months. Both increased age and duration of prior T use directly correlated with prolonged time to recovery at 6 and 12 months. Age consistently limited recovery at both time points, whereas duration of T use had less influence at 12 months than at 6 months. Among baseline azoospermic men, 64.8% reached the threshold at 12 months compared with 91.7% of cryptozoospermic men, though baseline count category did not independently predict failure.
Why it matters
This study provides clinical parameters to guide counseling on the timeline of spermatogenesis recovery after testosterone use, highlighting age and treatment duration as key prognostic factors.
Limits
The study is limited by a small sample size (n = 66), a single-center retrospective design, and the absence of an untreated control arm (such as T cessation alone). Pre-testosterone baseline semen parameters and functional fertility outcomes (such as pregnancy rates) were not reported.
Cited by
- supports Following testosterone replacement therapy cessation, recovery of sperm count and fertility can take up to two years.