The aim of this systematic review and meta-analysis was to identify the best available evidence on the efficacy of CPAP on serum total testosterone levels in male patients with OSA syndrome. All 7 studies with 9 cohorts presented total testosterone levels before and after CPAP treatment, 4 studies with 5 cohorts reported free testosterone levels , , , , and sex hormone binding protein (SHBG) was reported in 4 studies with 5 cohorts , , , . Information on characteristics of subjects, study design, pre- and post-CPAP treatment of serum total testosterone, free testosterone and sexual hormone blinding protein (SHBG) was extracted for analysis. Getting a good night's sleep is essential for your overall health, and now you know it can also impact your hormone balance. This leads to disrupted sleep, low oxygen levels, and, often, loud snoring. Remember that adhering to treatment guidelines for both OSA and any low testosterone issues is crucial for managing your symptoms and improving your health outcomes. If standard deviation was missing in a study for a specific outcome, it was calculated from standard error, 95% confidence interval (CI), or interquartile range; if none of these were available, the largest among the other studies was reported. Secondary outcomes included change in serum free testosterone, SHBG, LH, FSH, and PRL from baseline to the last available follow-up. Third, the terms "continuous positive airway pressure," "testosterone," and "gonadotropins" including luteinizing hormone (LH), follicle stimulating hormone (FSH), and prolactin (PRL) were searched in PubMed, in order to test the strategy. For more information, please review our Privacy Policy. Some medications or treatments discussed may not be offered by 1st Optimal or approved by the U.S. Never stop TRT abruptly without medical guidance, as this can cause withdrawal symptoms and hormone crashes. Furthermore, the severity of hypoxia during sleep, as indexed by the ODI and O2 nadir, is strongly correlated with the reduction in testosterone . Patients with OSA have less REM sleep, reduced deep sleep time, increased nighttime awakenings, sleep fragmentation, and reduced sleep efficiency, which leads to a low testosterone level . Several studies have confirmed a strong relationship between OSA and low testosterone. The increase in testosterone at the time of sleep, the decrease during the time of awakening, is stable within an individual, although there is large variability among individuals . Testosterone levels begin to rise upon falling asleep, peak at about the time of the first episode of REM sleep, and remain at the same level until awakening . NREM sleep accounts for 75% to 80% of total sleep time, and REM sleep accounts for the remaining 20% to 25% . This article reviews recent investigations on the relationship between OSA and testosterone deficiency. For those who already have sleep apnea, research shows testosterone replacement therapy can make symptoms worse. There’s also some evidence that suggests testosterone therapy may cause sleep apnea symptoms, but the symptoms may stop when therapy is discontinued. And another study on premenopausal women found testosterone may facilitate the development of central sleep apnea — when your brain doesn’t send the correct signals to the muscles in your airways during sleep. If you’ve got low testosterone levels, you may be thinking about taking supplements or speaking to a doctor about testosterone replacement therapy (TRT). There’s evidence to show testosterone replacement therapy may cause sleep apnea or make it worse, but we still don’t know for sure. The authors stated that CPAP does not influence serum total testosterone, free testosterone, and SHBG. A significant increase in serum total testosterone was reported only in the third group (28–30).