Losing both testicles, whether from cancer treatment, injury, or another medical reason, triggers a sharp drop in testosterone that affects nearly every system in your body. Within 12 hours of surgery, circulating testosterone falls by 90% to 95%. That single hormonal shift drives a cascade of changes to your metabolism, sexual function, bone health, mood, and fertility. The good news is that most of these effects are manageable with hormone replacement, and many men live full, healthy lives after bilateral orchiectomy.
The Testosterone Drop
The testicles produce roughly 95% of your body’s testosterone. When both are removed, your testosterone plummets to what doctors call “castrate levels” within about 12 hours. The American Urological Association defines low testosterone as anything below 300 ng/dL; after bilateral orchiectomy, levels typically fall far below that threshold. Your adrenal glands still produce a tiny amount of testosterone, but nowhere near enough to maintain normal function on their own.
This isn’t a gradual decline like aging. It’s sudden and severe, which is why the physical and emotional effects can feel overwhelming in the first weeks and months without treatment.
Body Composition and Metabolism
Without testosterone, your body starts redistributing how and where it stores fat. In the first year after surgery, body weight increases by about 3% on average. The pattern of fat gain shifts toward what’s typically seen in people with very low testosterone: more fat under the skin, particularly around the midsection. One case study documented a 41% increase in deep abdominal fat and a 16% increase in subcutaneous fat within eight months of surgery.
Muscle mass also decreases. Testosterone is a key driver of protein synthesis in muscle tissue, so without it, you’ll notice reduced strength and slower recovery from physical activity. Some men describe feeling physically weaker or more fatigued during everyday tasks.
The metabolic effects go beyond appearance. Fasting blood sugar levels rise by about 4%, and a key marker of long-term blood sugar control (HbA1c) increases by roughly 3% from baseline. These changes push the body toward insulin resistance, raising the risk of metabolic syndrome and type 2 diabetes over time. The relationship is direct: testosterone deficiency leads to fat accumulation, which worsens insulin sensitivity, creating a cycle that needs to be actively managed.
Sexual Function and Desire
Sexual desire is strongly dependent on testosterone. Most men experience a significant decline in libido after losing both testicles, and this is one of the most commonly reported concerns. Erectile function also suffers. Low testosterone alters blood flow mechanics in the penis, making it harder to achieve and maintain erections. In studies of men with low testosterone from testicular conditions, 89% of those with erectile difficulties also had measurably low testosterone levels.
It’s worth noting that erections aren’t solely hormone-driven. Nerve signals, blood vessel health, and psychological factors all play a role. Some men retain partial erectile function, particularly with hormone replacement. But without treatment, the combination of reduced desire and impaired erections typically has a major impact on sexual life. Orgasm may still be possible, though the experience often changes, and ejaculation will produce little to no fluid since the testicles no longer contribute sperm or testicular fluid.
Bone and Heart Health
Testosterone helps maintain bone density throughout a man’s life. When levels crash after bilateral orchiectomy, bones begin losing mineral content, increasing the risk of osteoporosis and fractures. This effect develops gradually over months and years, which makes it easy to overlook until a fracture actually happens. Bone density monitoring becomes an important part of long-term care.
Cardiovascular risk also rises. Androgen deprivation increases the likelihood of heart attacks, strokes, and cardiovascular death. One long-term study found that men with low testosterone who received hormone replacement had a mortality rate of about 10%, compared with roughly 21% in untreated men. Among men with type 2 diabetes specifically, the gap was similar: 8% mortality with treatment versus 19% without. These numbers underscore that testosterone replacement isn’t just about quality of life. For many men, it’s a meaningful factor in longevity.
Hormone Replacement Therapy
Since your body can no longer produce adequate testosterone on its own, hormone replacement becomes a lifelong treatment. The most common delivery methods are topical gels applied daily to the skin and injections given on a regular schedule. Implantable pellets placed under the skin every few months are another option. Your doctor will work with you to find the method that fits your lifestyle and keeps your levels stable.
The goal is to bring testosterone back into a normal range, which reverses or reduces many of the effects described above. Libido typically improves, energy returns, fat redistribution slows or partially reverses, and bone loss is mitigated. The AUA recommends checking testosterone levels every 6 to 12 months once you’re on a stable dose, along with routine bloodwork to monitor red blood cell counts and other markers.
One important caveat: if you’re being treated for prostate cancer, testosterone replacement is generally not an option, since the treatment’s purpose is specifically to eliminate testosterone that fuels the cancer. In that situation, managing side effects relies on other strategies like exercise, dietary changes, and medications targeting specific symptoms like bone loss.
Fertility After Losing Both Testicles
Bilateral orchiectomy permanently ends sperm production. There is no way to restore fertility after both testicles are removed. This makes sperm banking before surgery critically important for anyone who might want biological children in the future.
The standard approach is cryopreservation, freezing a semen sample before the procedure. The American Society for Reproductive Medicine recommends collecting a specimen before orchiectomy when possible, as this may be the last opportunity to obtain viable sperm. For men who can’t provide a sample through standard means, techniques like vibratory stimulation or electroejaculation offer alternatives with success rates around 60% to 70%. Sperm can also be surgically extracted from the testicle during the orchiectomy itself, with success rates approaching 70% in contemporary studies.
Despite how important this step is, fewer than half of cancer care providers routinely bring up fertility preservation before treatment. If you’re facing bilateral orchiectomy and haven’t been asked about sperm banking, raise it yourself. Frozen sperm can be stored indefinitely and used later for in vitro fertilization. Without banked sperm, donor sperm or adoption become the remaining paths to parenthood.
Emotional and Psychological Effects
The psychological impact varies widely, but it’s real and common. Among testicular cancer survivors, about one in five experiences significant anxiety, one in seven reports ongoing distress, and one in ten develops depression, all rates higher than the general population. Roughly 21% of men who undergo orchiectomy for prostate cancer seek psychiatric or psychological help afterward, compared to 10% before surgery.
Body image is a frequent concern. In one study of men after orchiectomy, 61% felt their body had changed, with about 10% describing moderate to severe changes in how they perceived themselves. Nearly one in five felt uncomfortable undressing in spaces like gyms or pools, and 13% reported body image concerns during sexual activity. These feelings don’t mean something is wrong with you. They’re a normal response to a significant physical change.
Testicular prostheses, silicone implants placed in the scrotum, are an option for men who want to restore a natural appearance. Patient satisfaction is generally positive, though complication rates are worth knowing about: roughly 32% of patients in one surgical series experienced some issue, most commonly the implant shifting position or, less often, infection or the implant working its way out. About 68% of men who had a prosthesis removed chose to have a new one placed, suggesting that for most, the benefits outweigh the risks.
What Daily Life Looks Like
With consistent hormone replacement, most men return to a daily routine that looks largely the same as before. Energy levels stabilize, mood generally improves, and physical activity remains possible and beneficial. Exercise, particularly resistance training, becomes especially valuable for counteracting muscle loss and metabolic changes.
The adjustments that remain are practical ones: keeping up with hormone therapy, attending regular blood work appointments, and staying aware of bone and heart health over the long term. Sexual function often improves significantly on testosterone replacement, though some men find that additional support like erectile dysfunction medications helps bridge the gap. The path forward after losing both testicles is genuinely manageable, but it requires active, ongoing attention to your health rather than a single fix.