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A Urologist's Guide to Low Testosterone, Fertility, Monitoring, and Long-Term Care. Every chapter of the book, distilled into a page you can read in five minutes — written by the urologist who wrote the book.
Part I
A lot of men walk in with the verdict already decided: a single flagged lab value plus an online questionnaire that blamed testosterone for everything.
Chapter 2Testosterone is one signal with specific jobs, not a master switch that runs male health.
Chapter 3Tiredness, low sex drive, unreliable erections, a thickening waist, and trouble concentrating can each be produced by sleep apnea, depression, medications, vascular disease, or genuine hypogonadism, and frequently by more than one at once.
Chapter 4One afternoon testosterone drawn while a man is sick can fall below the diagnostic line for reasons that have nothing to do with his testes or his pituitary.
Chapter 5Establishing that testosterone is low says nothing about why it is low, and the why determines fertility, the odds of reversal, how urgent things are, and what a treatment is actually fixing.
Part II
Apnea, excess weight, long illness, opioid or steroid prescriptions, and nonprescribed anabolic steroids all push testosterone down, and a low level can in turn worsen sleep, mood, and activity.
Chapter 7Only a small fraction of men with low testosterone have a tumor or failing gland, but for those who do, pushing the blood level up hides the underlying disease.
Chapter 8Desire and erection are separate functions, and testosterone touches each in a different way.
Chapter 9Prescribed testosterone signals the brain to stop driving the testes, so sperm production can collapse while the blood number looks reassuring.
Chapter 10A semen result is a snapshot taken under particular conditions, and getting sperm back after testosterone suppression follows a timetable that differs from man to man.
Part III
Dr.
Chapter 12A walkthrough of the FDA's testosterone label actions from 2015 to 2026: the required heart-attack and stroke warning and the mandated trial, the TRAVERSE result that led the agency to pull cardiovascular language from the boxed warning while adding a blood-pressure warning, and the 2026 requests and invitation that are not approvals.
Chapter 13No testosterone formulation is best for everyone, so I compare gels, injections, pellets, nasal, oral, and patch products by the tradeoffs that actually differ between them.
Chapter 14Replacing testosterone and stimulating your own production are different strategies, and I walk through what the evidence actually shows for hCG, clomiphene, enclomiphene, and nasal testosterone in men who want to keep their fertility.
Part IV
A higher lab number is not the same as a better life, which is why I insist on defining success before anyone starts testosterone.
Chapter 16TRAVERSE offered genuine reassurance about heart attack, stroke, and cardiovascular death in a selected group of men on gel over roughly three years, but it never made testosterone heart-safe.
Chapter 17Testosterone routinely pushes red-cell production up, and the count can cross a line in a man who feels entirely well.
Chapter 18When a PSA moves on testosterone, it is a message from the prostate rather than a verdict about cancer, and it deserves a repeat test and a risk-based work-up instead of comfort drawn from feeling fine.
Chapter 19Sleep-disordered breathing, acne and gel transfer, breast changes, retained fluid, and shifts in mood are the side effects I watch hardest, and a testosterone level in range excludes none of them.
Part V
If testosterone has not done what it was supposed to do, the answer is a disciplined review, of the original goal, the diagnosis, the measured exposure, how the medicine was really used, competing explanations, and side effects, rather than a bigger dose.
Chapter 21Coming off testosterone is a medical transition with four moving parts: the product has to clear, the pituitary has to resume signaling, the testicles have to respond, and symptoms follow their own path.
Chapter 22Years of testosterone treatment are not the opening decision replayed on autopilot; a man's health, the evidence base, his goals, his fertility plans, his product, and his access all shift over time.
Tools
A useful testosterone record preserves context, not just results.
Appendix BThis checklist organizes a cause-first conversation after a low testosterone result.
Appendix CFertility decisions are easiest to protect before prescription testosterone suppresses the reproductive axis.
Appendix DTreatment decisions become clearer when benefit, risk, burden, and goals are discussed separately.
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