TRT vs Enclomiphene: Which Is Right for You?

When men are diagnosed with low testosterone, traditional TRT (testosterone replacement therapy) is the most well-known treatment. But it's not the only option — and for some men, particularly those who want to preserve fertility, enclomiphene may be a better fit.

How traditional TRT works

TRT delivers exogenous (external) testosterone directly into the body via injections, gels, or creams. This raises testosterone levels quickly and reliably, typically producing noticeable improvements in energy, mood, and libido within 2–4 weeks.

The trade-off: because you're supplying testosterone externally, the body reduces its own production. The pituitary gland senses adequate testosterone and stops signalling the testes to produce it. This suppresses LH and FSH, which in turn suppresses sperm production.

For men who have completed their families or don't plan to have children, this trade-off is often acceptable. For younger men or those planning families, it presents a significant consideration.

How enclomiphene works

Enclomiphene is a selective oestrogen receptor modulator (SERM). Rather than replacing testosterone directly, it works at the pituitary level — blocking the feedback signal from oestrogen, which causes the pituitary to increase LH and FSH production. This stimulates the testes to produce more testosterone naturally.

The key advantage: because the testes are still producing testosterone endogenously, sperm production is maintained or even improved. Fertility is preserved.

Comparing the two approaches

Testosterone levels

TRT typically achieves more consistent and predictable testosterone levels, especially with injectable formulations like Reandron. Enclomiphene raises testosterone more modestly — usually into the mid-normal range — and levels can vary more day to day.

Speed of improvement

TRT works faster. Most men feel changes within 2–4 weeks. Enclomiphene takes longer — improvements in symptoms may take 4–8 weeks as the body's own production ramps up.

Fertility

This is the critical differentiator. TRT suppresses sperm production — sometimes to zero. Recovery after stopping TRT can take months or may not fully occur. Enclomiphene preserves and may enhance fertility by maintaining or increasing FSH.

Side effects

TRT side effects include erythrocytosis (increased haematocrit), oestrogen-related effects (fluid retention, breast tenderness), acne, and testicular atrophy. These are managed through monitoring and dose adjustment.

Enclomiphene side effects are generally milder: occasional headache, visual disturbances (rare), and mood changes. Because oestrogen is not suppressed but rather its feedback is blocked, oestrogen levels may rise — your GP will monitor this.

Cost

Reandron (the most common TRT injection) costs ~$30–$40 per dose on PBS. Enclomiphene is typically compounded and costs ~$40–$80/month. Consultation costs are the same for both treatments.

Who should consider enclomiphene?

• Men under 40 who may want children in the future
• Men actively trying to conceive
• Men with secondary hypogonadism (pituitary cause) — where stimulating the body's own production makes physiological sense
• Men who prefer to maintain their body's natural testosterone production

Who is better suited to TRT?

• Men who have completed their families
• Men with primary hypogonadism (testicular cause) — where the testes cannot respond adequately to stimulation
• Men who need more robust and predictable testosterone levels
• Men who have tried enclomiphene without adequate symptom relief

The bottom line

There is no single correct answer. The right treatment depends on your age, fertility goals, the cause of your low testosterone, and your clinical response. This is exactly the kind of decision that should be made with a qualified GP who understands your full picture — not by an algorithm on a subscription website.