Too Much Of A Good Thing: Why Testosterone Replacement Therapy Is Dangerous To Fertility

More energy. Less fat. More muscle mass. Better libido.

These are all purported results from Testosterone Replacement Therapy (TRT), a medical treatment that supplements a man's testosterone through hormonal skin patches, gels, mouth patches, or injections and implants.

Sounds great, right? Sign me up! Well, not so fast.

Side Effects of TRT

Despite its compelling benefits, there are just as many—if not more—substantial risks with TRT. This treatment increases the risk of heart attack not only in older men, but also in younger men with a history of heart disease.

TRT can also make benign prostatic hypertrophy worse and can even stimulate prostate cancer to grow. Other issues TRT can worsen include sleep apnea and erythrocytosis (high blood count), making blood thicker and more prone to clotting.

TRT and Infertility

Infertility is an often under-represented risk of TRT. In fact, supplemental testosterone from outside the body is so effective at stopping sperm production that it was once considered as a potential method of birth control.

A recent study published in Fertility and Sterility found that while testosterone use among fertility patients was actually relatively low, its effects were nonetheless devastating. Even after six months of discontinued use of testosterone, more than a third of men studied did not regain the ability to produce sperm.

The Future of Testosterone Use

While testosterone use in patients struggling to conceive is relatively low, statistics say it's likely to rise. Between 2000 and 2011, the prescription of supplemental testosterone increased by more than 850 percent in the U.S., according to new research. The study authors believe that new, easy-to-use forms of testosterone along with television marketing are primarily responsible for the rise in prescription rates.

Over the same period, global pharmaceutical sales of testosterone increased from about 150 million to 1.8 billion dollars. Obviously someone is benefitting from this substantial increase in the use of supplemental testosterone. Unfortunately, it's usually not the patient taking the testosterone.

"Global pharmaceutical sales of testosterone increased from about 150 million to 1.8 billion dollars. Obviously someone is benefitting from this substantial increase. Unfortunately, it's usually not the patient taking the testosterone."

Before you or your partner pursue TRT, be sure to weigh the risks of the treatment—especially if you're thinking of trying to conceive.

Try natural ways of increasing testosterone instead. Losing weight, increasing your exercise, reducing stress, eating healthier, and getting more sleep can all have a positive impact on your testosterone levels. And guess what? None of these lifestyle improvements will increase your risk of heart attack or make you infertile. Quite the contrary!

Frequently Asked Questions

Can sperm production recover after stopping TRT?

It may, but recovery is not guaranteed and can take a long time. Research published in Fertility and Sterility found that even after six months of discontinued TRT use, more than a third of men had still not regained the ability to produce sperm. If you are planning to conceive, it's critical to discuss this risk with your doctor before starting TRT.

Are there safer alternatives to TRT for low testosterone?

Yes. Lifestyle changes — including weight loss, regular exercise, stress reduction, improved sleep, and a healthier diet — can all meaningfully raise testosterone levels naturally. These approaches carry none of the cardiovascular, prostate, or fertility risks associated with exogenous testosterone supplementation.

Why did TRT prescriptions rise so dramatically?

Research points to two primary drivers: the introduction of easier-to-use delivery formats (gels, patches, and implants) and aggressive direct-to-consumer television marketing. Between 2000 and 2011, prescriptions rose over 850% in the U.S., while global pharmaceutical sales grew from roughly $150 million to $1.8 billion — a striking commercial expansion that outpaced genuine clinical need.

How does the Conceivable system actually work?

Conceivable combines three things: personalized supplement packs built from your quiz results and health data, an AI care team of 7 specialists (led by Kai, your fertility coordinator) who adjust your protocol as your body changes, and the Halo Ring for continuous biometric tracking. The system is built on 240,000+ clinical data points and 20 years of practice. It starts at $15/month.

How do I know which supplements I actually need?

Take the free 2-minute Conceivable quiz. It analyzes your cycle patterns, energy, stress, digestion, and health history to identify the specific nutrients your body needs — not a generic prenatal, but a protocol built for exactly where you are right now.

Do I need the Halo Ring to use Conceivable?

No. The Halo Ring is optional and adds continuous tracking of BBT, HRV, sleep, and blood glucose — which Kai uses to fine-tune your protocol in real time. But the personalized supplement packs and AI care team work without it. The ring is a one-time $250 purchase with no subscription required.