Testosterone Therapy & Fertility: What Men Should Know Before Starting

If you're a man in your 30s or 40s with low testosterone symptoms and you also want kids, or might someday, there's one question you should ask before anyone writes a prescription: what will this do to my fertility? It's one of the most important conversations in men's health, and one of the most commonly skipped. Here's the honest answer.

How Testosterone Therapy Affects Fertility

Your body makes testosterone and sperm under the direction of the brain, which sends signals (LH and FSH) to the testes. When you take testosterone from outside the body, the brain senses plenty of testosterone and turns those signals down. The testes then make less of their own testosterone, and sperm production drops, often significantly. For many men on testosterone therapy, sperm counts fall very low or stop altogether while on treatment.

Two things are worth saying clearly. First, testosterone therapy is not a form of birth control, and you shouldn't rely on it as one. Second, for most men the effect on sperm production is reversible after stopping, but recovery takes time, often months, and it varies from person to person. It isn't guaranteed, which is why timing matters.

If You Want Children Now Or Soon

If you're trying to conceive or expect to in the next few years, tell your provider before starting. There are approaches that aim to support your body's own testosterone production instead of replacing it, and a baseline semen analysis can show where you're starting from. Whether any of them fit depends on your labs, your symptoms and your timeline, so this is a case-by-case decision, not a standard protocol. Starting standard testosterone therapy first and sorting out fertility later is the path we most want to help people avoid.

If Fertility Isn't A Concern

Men who are done having children, or who don't plan to, often feel much better on properly monitored treatment, and the fertility effect isn't a barrier. It's still worth knowing about, and it's part of why we monitor closely. See how that works in our guide to TRT monitoring, or read the broader truth about testosterone therapy.

From Our Clinical Director

"The patients who regret their decision are almost never the ones who chose TRT knowing the fertility tradeoff. They're the ones nobody told. If kids are on your horizon, we'll build the plan around that first, and the testosterone question second."

McKell Johnson, FNP-BCClinical Director, Abbott Health & Wellness

The Bottom Line

Testosterone therapy can reduce sperm production and isn't contraception. If fertility matters to you in the near term, say so at the start so your plan can be built around it. Start with the labs: find out whether your testosterone is actually low and talk through your goals with a provider who will ask about them. Or book a consultation.

Prices are current as of October 2026 and subject to change. This page is for general information and does not constitute medical advice. Final treatment recommendations and pricing are confirmed at your consultation. — Abbott Health & Wellness, 45 North State Street, Salina, UT 84654.