What Are TRT Options for Adults With 46,XX Testicular DSD?

For many individuals with 46,XX testicular DSD, the body may not produce enough testosterone naturally as they reach adulthood. This leads to hypergonadotropic hypogonadism, a condition where testosterone levels remain low despite the brain sending strong stimulating signals ^[1]. Because this is usually a persistent deficiency, long-term or lifelong testosterone replacement therapy (TRT) is often recommended to correct the imbalance and manage symptoms ^[2][3].

Fertility and Pre-Treatment Considerations

Before starting TRT, it is important to discuss your reproductive goals with your care team. 46,XX testicular DSD is usually associated with severe infertility because the genetic material required for sperm production is typically absent ^[4][5]. It is crucial to understand that TRT does not restore fertility; in fact, exogenous (outside) testosterone can further suppress any remaining signals from the brain and halt potential sperm production ^[6]. Genetic counseling and discussions with a reproductive endocrinologist can help clarify your specific family-building options before you begin treatment ^[7].

Before prescribing testosterone, your doctor will also evaluate baseline lab work, check your blood pressure, and review your medical history for conditions that might require special care, such as untreated severe sleep apnea, a history of blood clots, or hormone-sensitive cancers ^[6].

Options for Taking Testosterone

TRT should be individualized based on your health profile, lifestyle, and preferences ^[3]. Because DSD-specific evidence comparing these methods is limited, your doctor will use general hypogonadism guidelines to help you choose the best fit ^[3]. The formulations are not interchangeable, and you should not switch between them without medical advice. Common options include:

• Topical Gels: Applied daily to specific areas approved by the product label (often the shoulders, upper arms, or abdomen).
  • Safety warning: You must take strict care to avoid transferring the gel to others (especially children, pregnant people, and pets), as secondary exposure can cause unintended hormonal effects. Wash your hands immediately after application, let the area dry completely, and cover it with clothing. If prolonged skin-to-skin contact is expected, wash the application site with soap and water first. If accidental contact occurs, wash the exposed person’s skin immediately with soap and water.
• Injections: Given into the muscle or under the skin. The schedule depends heavily on the specific formulation—some are weekly or biweekly, while others last longer. While affordable and effective, some schedules can cause “peaks and valleys” in hormone levels (affecting energy or mood), though your doctor can adjust the dose or frequency to minimize this.
• Patches: Worn on the skin and changed daily, providing steady doses. They avoid the transfer risk associated with gels but can sometimes cause local skin irritation.
• Pellets: Implanted under the skin by a doctor every 3 to 6 months. While they avoid daily maintenance, the dose is difficult to adjust or remove once inserted, and the minor office procedure carries small risks of pain, infection, or the pellet extruding (coming out) through the skin.
• Compounded Creams: Sometimes prescribed, but their absorption rates and standardizations can vary widely compared to commercially regulated products.

Long-Term Health and Why Consistency Matters

Rather than a fixed “lifelong commitment,” think of TRT as an ongoing therapy that requires evaluation. Stopping TRT without medical advice can cause symptoms of low testosterone to return ^[1]. Appropriately replacing testosterone helps address long-term health concerns common in non-CAH 46,XX DSD ^[6]:

• Bone Health: Testosterone is crucial for maintaining bone density and helping to prevent osteoporosis (weak, brittle bones) ^[2][6]. TRT should be paired with other bone-health measures like weight-bearing exercises, adequate calcium and vitamin D, fall prevention, and avoiding smoking ^[2].
• Cardiometabolic Health: While correcting low testosterone can improve some symptoms and body composition measures, it is not a proven treatment to prevent cardiovascular disease. TRT requires careful monitoring because it can sometimes affect blood pressure, worsen sleep apnea, or cause fluid retention (edema) ^[6]. Managing overall cardiovascular risk factors remains essential.

Routine Monitoring on TRT

Your endocrinologist will check you regularly to ensure the dose keeps your testosterone in an appropriate physiologic adult range ^[3]. The exact timing of your blood tests will depend on which TRT formulation you use. Monitoring typically includes:

• Hematocrit: TRT can stimulate red blood cell production. Your doctor will routinely check your hematocrit (the proportion of red blood cells in your blood) to ensure your blood does not become too thick, which could increase clotting risks.
• Bone Density (DXA) Scans: Depending on your baseline bone density and risk factors, your doctor may order DXA scans at customized intervals to check for bone thinning ^[6].
• Prostate Health: If you have a prostate, monitoring should be individualized based on your age, anatomy, family history, and symptoms ^[6]. Prostate-Specific Antigen (PSA) blood tests and physical exams are not automatically required for everyone on TRT, but may be recommended based on shared decision-making ^[8].
• Clinical Response: Your team will monitor your blood pressure, mood, sleep quality, and how well your symptoms are being managed.

When to Seek Medical Attention

Contact your doctor routinely if you notice worsening sleep apnea, acne, mood changes, or breast swelling. Seek urgent medical care if you experience severe headaches, neurologic symptoms, chest pain, shortness of breath, or sudden swelling in one leg, as these could be signs of serious cardiovascular or clotting events.