Fertility, hCG, and Family Planning on TRT

TRT suppresses your hypothalamic-pituitary-gonadal (HPG) axis. When you inject exogenous testosterone, your brain detects 'enough T' and reduces LH and FSH production. LH stimulates testosterone production in the testes; FSH drives sperm production. With LH and FSH suppressed, your testes stop producing both testosterone and sperm. This is highly effective contraception for many men — sperm counts often drop to zero within 3-6 months of starting TRT. However, it's not reliable enough to use as birth control alone. Fertility usually returns after stopping TRT, but recovery can take 6-18 months and isn't guaranteed — especially after years of use.

Human chorionic gonadotropin (hCG) mimics LH, keeping the testes stimulated even while on TRT. This maintains: testicular size (prevents atrophy), natural testosterone production (works alongside injected T), fertility (preserves sperm production), and intratesticular testosterone (important for sperm maturation). Typical hCG protocol: 250-500 IU 2-3 times per week alongside TRT. Higher doses aren't necessarily better and can cause E2 spikes. hCG is injectable (SubQ, same technique as TRT). Downsides: requires refrigeration, additional injections, can elevate E2, and some clinics charge extra for it. Not all men need hCG — if you're done having children and don't mind testicular atrophy, TRT alone is fine.

Option 1: hCG alongside TRT from day one — best chance of maintaining fertility. Recommended for men who want children within 1-3 years. Option 2: TRT alone, add hCG later when trying to conceive — less reliable, but can work. Option 3: TRT alone, come off and do a 'restart' with hCG +/- clomiphene when ready — most disruptive but works for many. Option 4: Freeze sperm before starting TRT — the insurance policy. Option 5: hCG + FSH (or hMG) — the nuclear option for men who've been on TRT long-term and need to restore fertility quickly. This is expensive and requires specialist fertility care. The best time to address fertility is before starting TRT, not after.

Baseline fertility assessment: semen analysis before starting TRT (if fertility matters to you — saves guessing later), LH and FSH blood levels (tells you if you were already hypogonadotropic), and testicular examination. On TRT with hCG: semen analysis every 6-12 months if actively preserving fertility, monitoring for any decline in parameters. When trying to conceive: semen analysis every 3 months, work with a reproductive endocrinologist if no pregnancy after 6 months. Key reminder: female fertility is the other half of the equation — her age and reproductive health matter just as much.