Raising testosterone without putting fertility on hold

Why testosterone therapy affects sperm

Sperm production depends on two things inside the testes: FSH from the pituitary and a very high local level of testosterone, far higher than in the blood. When you take testosterone from outside, the brain senses plenty of hormone and lowers LH and FSH. Blood testosterone goes up, but testosterone inside the testes falls, and sperm production can slow dramatically or stop.

This is why the American Urological Association states that clinicians should not prescribe testosterone to men who want current or future fertility, and why its testosterone deficiency guideline advises discussing the long-term impact on sperm with any man interested in future fertility.

How enclomiphene takes a different route

Enclomiphene is a selective estrogen receptor modulator. It blocks estrogen's 'enough' signal in the brain, so the pituitary releases more LH and FSH. LH tells the testes to make more of their own testosterone, and FSH supports sperm production. Instead of overriding the system, it turns it up.

Phase III trials in overweight men with secondary hypogonadism, published in BJU International, found that 16 weeks of enclomiphene raised total testosterone, LH and FSH while keeping sperm concentration in the normal range. Testosterone gel, the comparison, raised testosterone but markedly reduced sperm production.

What it cannot promise

Supporting sperm production is not the same as improving fertility. Pregnancy depends on many factors, including sperm movement and shape, your partner's age and health, and timing. The AUA advises that for men with unexplained infertility, SERMs offer limited benefit compared with assisted reproductive technology.

Enclomiphene also only works when the testes can respond. In primary hypogonadism, where the testes themselves are failing, raising LH has little effect. And because enclomiphene is not FDA-approved, long-term safety data are limited.

What a fertility-minded plan includes

• Two early-morning testosterone tests to confirm the diagnosis
• LH, FSH, estradiol and prolactin to identify the cause
• A semen analysis before treatment, ideally repeated if abnormal
• A review of medicines, supplements and anabolic steroid use, past or present
• Follow-up labs a few weeks after starting, then periodically
• Referral to a urologist or fertility specialist if conception does not happen as expected

Coming off testosterone

Many men considering enclomiphene are already on testosterone and now want to have children. Sperm production often recovers after stopping testosterone, but recovery can take months and is not guaranteed, especially after long use. Your clinician may discuss enclomiphene or other options to support recovery and will usually recommend a semen analysis to track progress. Do not stop testosterone abruptly without a plan, as symptoms of low testosterone can return quickly.

Habits that support sperm health

Medication is only one part of the picture. Sperm take roughly two to three months to develop, so changes you make today show up in a semen analysis months later. Several everyday factors are worth attention while you are trying to conceive.

• Avoid all testosterone, anabolic steroids and 'prohormone' supplements
• Limit alcohol and stop smoking or vaping
• Aim for a healthy weight; obesity is linked to lower testosterone and sperm quality
• Treat sleep apnea if you have it
• Avoid prolonged heat to the groin, such as hot tubs or laptops on your lap
• Review medicines with your clinician, since some affect sperm production

Our male fertility test

HealifyMD offers a Male Fertility Test for $299 one-time, which can give you and your clinician a baseline before treatment and a way to measure change. Your clinician will explain when to collect and how to interpret results.

The Enclomiphene / DHEA / Boron / Pregnenolone ODT is compounded by a licensed U.S. pharmacy. Compounded medications are not FDA-approved and are not reviewed by the FDA for safety, effectiveness or quality. If fertility is your main goal, ask whether the added DHEA, boron and pregnenolone are appropriate, since their effects on fertility are not well studied. The ODT costs from $129/month, or $349 for three months ($116/month), with no membership fee, confirmed at the eligibility review; labs are priced separately.