Our Services
Medical Information
Helpful Resources
Published on: 9/14/2026
Semen retention does not reliably raise testosterone, and the claim traces back mostly to a single small 2003 study in which testosterone spiked around day seven of abstinence before returning to baseline, while other research shows abstinence beyond a few weeks may slightly lower or simply not change hormone levels. Regular ejaculation has not been shown to cause lasting drops in testosterone, so most "NoFap" hormonal promises are not supported by strong evidence, though abstinence can still affect mood, sperm quality, and sexual function in ways worth knowing. Genuinely low testosterone usually stems from factors like poor sleep, obesity, chronic stress, medications, or a testicular or pituitary problem, and it shows up as fatigue, low libido, erectile issues, mood changes, and loss of muscle mass. There are several important nuances and exceptions to consider before drawing conclusions about your own hormones, so see below for the complete answer.
If your real concern is low energy, low sex drive, or performance changes, guessing at a cause can delay finding the actual, treatable reason, and symptoms like these overlap with thyroid disease, depression, sleep apnea, and hormone disorders. Take a free, instant, online symptom check to see which possibilities fit your situation and get a clearer sense of whether it is time to speak with a clinician.
Last reviewed for medical accuracy: 09/13/2025
Semen retention—the practice of avoiding ejaculation for days or weeks at a time—has gained popularity online. Advocates claim benefits ranging from higher testosterone to better focus and energy. But what does the science say? Below, we separate credible findings from common myths and share practical take-aways.
Semen retention involves intentionally delaying ejaculation. Reasons people try it include:
Some traditions ( Taoism, Hindu tantra, Stoicism adaptations) frame it as a path to greater vitality. Yet modern claims often overstate effects, especially around hormones.
Testosterone drives male sex characteristics, muscle mass, mood and libido. The idea that retention significantly boosts it is widespread—but mostly a myth.
Key studies:
Jiang et al. (2003)
Comparisons with ejaculation
Meta-analyses
Conclusion: occasional days without ejaculation may cause a brief, modest testosterone uptick around day 7. But there’s no reliable, long-term hormonal boost from prolonged retention.
Generally, semen retention isn’t harmful, but be aware of:
If you experience pain, significant mood shifts or relationship conflicts, it’s wise to reassess your approach.
If you’re unsure whether your symptoms stem from hormones, stress or something more serious, consider a free, online symptom check, using the doctor approved Ubie Symptom Checker.
While most people experimenting with semen retention don’t face serious medical risks, certain signs warrant prompt medical attention:
Always speak to a doctor about anything that could be life threatening or serious. A healthcare professional can order hormone tests, screen for underlying conditions and guide you toward evidence-based treatments.
Semen retention benefits and myths often get tangled. Current research shows only a brief spike in testosterone around day 7 of abstinence, with no sustained long-term increase. Any perceived mental or energy gains are likely tied to psychological factors—discipline, placebo effect or lifestyle shifts accompanying the practice.
For lasting health and hormone balance, prioritize proven strategies: balanced nutrition, regular exercise, stress reduction and quality sleep. If you choose to experiment with retention, do so thoughtfully, stay attuned to your body and keep open communication with partners. And remember, for serious or persistent issues, nothing replaces a professional medical evaluation.
(References)
* de Bruijn M, Broekman M, van der Schoot P. Sexual interactions between estrous female rats and castrated male rats treated with testosterone propionate or estradiol benzoate. Physiol Behav. 1988;43(1):35-9. doi: 10.1016/0031-9384(88)90095-9. PMID: 3413248.
* Exton MS, Krüger TH, Bursch N, Haake P, Knapp W, Schedlowski M, Hartmann U. Endocrine response to masturbation-induced orgasm in healthy men following a 3-week sexual abstinence. World J Urol. 2001 Nov;19(5):377-82. doi: 10.1007/s003450100222. PMID: 11760788.
* Jiang M, Xin J, Zou Q, Shen JW. A research on the relationship between ejaculation and serum testosterone level in men. J Zhejiang Univ Sci. 2003 Mar-Apr;4(2):236-40. doi: 10.1631/jzus.2003.0236. PMID: 12659241.
* Oztürk Mİ, Koca O, Tüken M, Keleş MO, Ilktaç A, Karaman MI. Hormonal evaluation in premature ejaculation. Urol Int. 2012;88(4):454-8. doi: 10.1159/000336137. Epub 2012 Feb 23. PMID: 22378309.
* Alonge S, Melandri M, Leoci R, Lacalandra GM, Aiudi G. Ejaculation effect on blood testosterone and prostatic pulsed-wave Doppler ultrasound in dogs. Reprod Domest Anim. 2018 Sep;53 Suppl 2:70-73. doi: 10.1111/rda.13277. PMID: 30238660.
* Fritz WF Jr, Sena LS, Becker SE, Katz LS. Differential effects of androgens, estrogens and socio-sexual context on sexual behaviors in the castrated male goat. Horm Behav. 2019 Mar;109:10-17. doi: 10.1016/j.yhbeh.2019.01.008. Epub 2019 Feb 1. PMID: 30708030.
* Tahtali İN. Is testosterone replacement an effective treatment of secondary premature ejaculation? Andrologia. 2020 Feb;52(1):e13452. doi: 10.1111/and.13452. Epub 2019 Oct 27. PMID: 31657066.
* Fiala L, Lenz J. Psychosocial stress, somatoform dissociative symptoms and free testosterone in premature ejaculation. Andrologia. 2020 Dec;52(11):e13828. doi: 10.1111/and.13828. Epub 2020 Sep 29. PMID: 32990998.
* Rew KT. Men's Health: Male Sexual Dysfunction. FP Essent. 2021 Apr;503:28-33. PMID: 33856181.
* Ongun S, Sarikaya E, Sarac A, Sel E, Guner O, Demir O, Esen AA, Durmus N. Bilateral orchiectomy deteriorates the structure and function of seminal vesicles in a rat model. Int J Impot Res. 2024 Jun;36(4):443-447. doi: 10.1038/s41443-023-00662-z. Epub 2023 Jan 10. PMID: 36627510.
We would love to help them too.
For First Time Users
We provide a database of explanations from real doctors on a range of medical topics. Get started by exploring our library of questions and topics you want to learn more about.
Was this page helpful?
Purpose and positioning of servicesUbie Doctor's Note is a service for informational purposes. The provision of information by physicians, medical professionals, etc. is not a medical treatment. If medical treatment is required, please consult your doctor or medical institution. We strive to provide reliable and accurate information, but we do not guarantee the completeness of the content. If you find any errors in the information, please contact us.