If both physical examination and serum chemistry tests are normal, then by exclusion a diagnosis of constitutional pubertal delay must be considered. The clinical signs and symptoms of hypogonadism will vary depending on whether the patient presents before or after puberty. For the diagnosis of primary hypogonadism, FSH measurement is particularly important because FSH has a longer half life, is more sensitive, and demonstrates less variability than LH.2,3 In the prepubertal age group, hypogonadism might be either primary hypogonadism or secondary hypogonadism. In the normal male, the start of puberty is apparent by enlargement of the testes and the appearance of pubic hair, followed by the appearance of auxiliary and facial hair. For example, PSA levels of 1.5 ng/mL, 2.3 ng/mL, and 3.3 ng/mL over 3 years do not meet the first indication for urology referral (more than 1.4 ng/mL over a year's time) but show an average PSA velocity of 0.9 ng/mL and require referral based on that criterion (11). Patients receiving the intramuscular testosterone enanthate or cypionate should have levels checked midway between injections, and levels should be checked 3 to 12 hours after application in the case of transdermal patches (11, 13). Testosterone levels should be monitored 3 to 6 months after initiation of treatment. The general target level for testosterone ranges from 350 to 750 ng/dL, which is roughly the range for healthy, androgen-sufficient adult men. Debate also surrounds to what extent metastatic prostate cancer and breast cancer may be stimulated during testosterone treatment. If initial test results are low, repeat measurements are recommended in 2 to 3 weeks, since repeat levels may be within the normal range in up to 30% of cases. The Massachusetts Male Aging Study (10), an observational cohort study conducted on healthy men aged 40 to 70 years from the Boston area, estimated that the prevalence of androgen deficiency (total testosterone This syndromic approach involving clinical and biochemical criteria allows physicians to identify patients who are symptomatic from androgen deficiency and separate them from those with isolated biochemical hypogonadism and nonspecific symptoms from aging. Despite these limitations, we believe this study has important strengths, including a large sample size, representation of all U.S. geographic regions, access to detailed laboratory data, and inclusion of a broad age range. Third, information on the physician who prescribed the medication was not available in this data source, and we were unable to determine whether or not patients who were seen by an endocrinologist or urologist were prescribed testosterone by another provider. Moreover, our data would not have captured testosterone laboratory tests that were conducted at a Veterans Affairs clinic or a commercial testosterone clinic. We also reported that 39.3% of new testosterone users did not have a serum PSA test conducted in the 12 months before treatment, and 56.7% did not have this test conducted in the 12 months following treatment. It is unclear why such a large percentage of patients failed to receive the recommended testosterone assessment either before or after initiating treatment. Whether you're managing injections, gels, patches, or pellets, TRT Tracker provides everything you need to monitor your hormone health, maximize treatment outcomes, and experience the full benefits of optimized testosterone levels.THE ULTIMATE TRT COMPANIONTRT Tracker is specifically designed for men on Testosterone Replacement Therapy who want to optimize their protocol, track symptoms, monitor blood work, and improve communication with healthcare providers. A healthy male adult patient with a serum testosterone level greater than 400 ng/dL is unlikely to be testosterone deficient, and therefore clinical judgment should be exercised if he has symptoms suggestive of testosterone deficiency. In males, serum testosterone levels show a circadian variation, with the highest levels in the morning and lowest levels in the late afternoon. In addition, it is possible that, in some cases, physicians judge that symptoms (e.g., fatigue and loss of muscle mass) merit monitored testosterone therapy, even in the absence of clinically defined low testosterone levels. A hematocrit test is recommended prior to therapy initiation to establish a baseline for future monitoring. Other potential side effects of TRT include fluid retention, acne, sleep apnea, gynecomastia, and infertility (11). Further studies are needed to determine the exact role of testosterone and TRT in cardiovascular risk. Improvement in bone mineral density has been reported, but no studies exist that determine whether the risk of fractures in these patients decreases when receiving TRT (11, 12, 18). Obese patients should also be assessed for obstructive sleep apnea, which is also an important cause of low T (16). It is therefore important to recommend weight loss either prior to or concomitant with TRT in obese patients. Normal values for testosterone levels vary among different sources (2, 11, 12). In men, testosterone levels increase from puberty to adulthood and then progressively decline starting by the fourth or fifth decade of life (4). Aggressive marketing campaigns by pharmaceutical companies have led to increased awareness of this topic, and primary care physicians are seeing more patients who are concerned about "low T." Unfortunately, testosterone replacement therapy has not been straightforward. Measuring testosterone levels became easier in the 1970s, and it wasn't long before levels were being checked in men across all age groups. We also did not examine testosterone laboratory tests that were conducted more than 12 months prior to testosterone therapy initiation. Our findings that 19.5% of new testosterone users who were tested had serum testosterone ≥300 ng/dl suggests that, despite the Endocrine Society's recommendations, there may not be a broad consensus among physicians regarding the clinical definition of hypogonadism. Likewise, no serum testosterone test was noted for 48.0% of men in the 12 months following the initiation of treatment. We assessed screening and monitoring patterns in men receiving testosterone therapy in the U.S. Take control of your hormone health today and experience the difference that comprehensive TRT tracking can make in your treatment journey! Always consult a qualified healthcare professional before making any changes to your treatment, medication, or therapy plan. See exactly how your levels respond to treatment over months -- not just a snapshot from one test. High T levels can be an issue for both people with penises and people with vulvas. Birth control pills are known to block T levels from getting too high. If a tumor is causing your T levels to spike, a doctor may recommend surgery to remove the tumor. There are few absolute contraindications to testosterone replacement therapy other than prostate or breast cancer, a hematocrit of 55% or greater, or sensitivity to the testosterone formulation. It can be easily diagnosed with measurement of the early morning serum total testosterone level, which should be repeated if the value is low. Lipid disturbances in testosterone-treated male patients are generally not a problem because the ratio of high-density lipoprotein to total cholesterol usually remains constant. Digital rectal examination of the prostate and PSA assay should be performed before initiation of therapy, along with an assessment of prostate-related symptoms. In most cases, an early morning serum total testosterone level is adequate to determine whether dosage adjustment is necessary. The goal of replacement therapy is to maintain testosterone in the normal physiological range; therefore, a combination of clinical and biochemical measures should be monitored 6 to 12 weeks after initiating therapy. The usual treatment is initiation of therapy with small doses of testosterone (50–100 mg IM) every 3 to 4 weeks at the appropriate psychosocial stage in development. This double measurement is recommended because a substantial percentage of men with an initial testosterone level in the mildly hypogonadal range are reported to have a normal testosterone level on repeat measurement.26 Our study showed that 82.0% of men did not receive two serum testosterone tests and 24.6% were without a single serum testosterone test before beginning treatment. The objective of testosterone replacement therapy is to normalize serum testosterone and maintain the level within the eugonadal state. Although the normal range for serum testosterone might vary between different laboratories, the normal range for early morning total testosterone in healthy adult males is approximately 300 ng/dL to 1000 ng/dL.7,8 If testosterone is confirmed to be low, it is recommended to categorize the hypogonadism as primary or secondary by checking levels of luteinizing hormone and follicle-stimulating hormone. Many men with low testosterone levels have no symptoms, and many men with symptoms who receive treatment and reach goal testosterone levels have no improvement in their symptoms. In addition, among patients who were tested, almost one-fifth had all testosterone levels ≥300 ng/dl before beginning treatment.