Yes, testosterone permanently changes your voice. Once testosterone thickens and lengthens the vocal folds, those structural changes persist even if you stop taking the hormone. This is true whether the testosterone comes from natural puberty, hormone therapy, or anabolic steroids. The voice deepening is widely considered one of the few effects of testosterone that does not reverse on its own.
Why the Changes Are Permanent
Vocal folds contain androgen receptors, meaning they respond directly to testosterone. When testosterone levels rise, it triggers the vocal folds to grow longer and thicker. In cisgender males going through puberty, the vocal folds nearly double in length, reaching about 1.6 cm compared to 1.0 cm in females. The vocal tract also lengthens, from roughly 14.1 cm to 16.9 cm. These are physical, structural changes to tissue and cartilage, not temporary swelling. That’s what makes them stick.
Think of it like bone growth during puberty. Once the tissue has changed shape and size, the body doesn’t shrink it back when hormone levels shift. Stopping testosterone doesn’t cause the vocal folds to thin out or shorten again.
How Much Your Voice Drops
For transgender men starting testosterone therapy, research shows the average pitch drops by about 49 Hz (roughly 6.4 semitones) within the first 12 months. That’s a significant shift, enough to move from a typical female speaking range into a typical male one.
The timeline varies from person to person. Some people notice their voice dropping within the first few weeks, while others see little change in the first three months. Most of the deepening happens within six to nine months. All seven participants in one study reached a cisgender male average pitch within six months, and four of them continued dropping after that point. If you’re on testosterone and haven’t noticed changes in the first couple of months, that’s not unusual.
Adults vs. Adolescents
Starting testosterone as an adult produces a somewhat different set of changes than going through natural male puberty as a teenager. During puberty, the entire larynx grows larger, the vocal tract lengthens as the body grows taller, and the cartilage framework of the voice box reshapes significantly. Adults who start testosterone get the vocal fold thickening and lengthening, but their laryngeal cartilage is more rigid (it starts to harden with age) and isn’t believed to grow the way a teenager’s would. They also don’t get the vocal tract lengthening that comes from overall height increases.
This means adults on testosterone will get a noticeably deeper voice, but the total range of change may be slightly different from what happens during natural male puberty. People who start testosterone under age 40 and begin with a lower dose tend to report fewer vocal difficulties like hoarseness or loss of singing range during the transition period.
What About Stopping Testosterone?
The medical consensus is that voice deepening from testosterone is irreversible. UF Health lists voice deepening specifically as a permanent effect of androgen exposure in female adults, even when other masculinizing effects fade after stopping the hormone. Studies following women who used anabolic steroids found that the lower pitch, reduced fundamental frequency, and vocal fold thickening persisted up to four years after they stopped.
There is one nuance worth knowing. A case study tracking a woman’s voice over 20 years after she stopped anabolic steroids suggested that some very gradual changes might occur over much longer time frames. The authors proposed that part of the initial voice deepening could involve fluid retention (edema) in the vocal folds, which might slowly resolve over many years, leaving the folds somewhat thinner than at their peak. But this is a single case, and no large studies have confirmed it. For practical purposes, you should expect voice changes from testosterone to be permanent.
Estrogen Does Not Reverse It
A common question, especially from transgender women or detransitioners, is whether taking estrogen can undo a testosterone-deepened voice. It cannot. Estrogen does not shrink or thin vocal folds that have already been thickened by testosterone. This is why transgender women who went through male puberty typically retain a deeper voice even after years of estrogen therapy. Voice training and surgery are the options for raising pitch after testosterone exposure, not additional hormones.
Options for Raising Pitch After Testosterone
If you want a higher voice after testosterone has deepened it, the two main paths are voice training and surgery.
Voice training works on resonance, pitch habits, and speaking patterns. Many people achieve a convincingly feminine or higher-pitched voice through consistent practice with a speech-language pathologist, without any surgical intervention. It takes time and effort, but it can be highly effective.
For those who want a more permanent physical change, voice feminization surgery offers several approaches:
- Anterior glottal web formation (Wendler glottoplasty): The most common procedure. A surgeon removes tissue layers from the vocal folds at the front of the voice box and stitches them together, effectively shortening the vibrating length. This raises pitch the most of all available procedures.
- Laser reduction glottoplasty: Uses laser energy to tighten the outer tissues of the vocal folds, increasing their tension and raising pitch.
- Feminization laryngoplasty: Removes cartilage and parts of the vocal folds, lifts the voice box, and shortens the cords. A more involved procedure.
- Cricothyroid approximation: An older technique that stitches cartilage together to tighten the vocal folds. It’s falling out of favor because the results don’t last as well as other options.
Voice feminization surgery can successfully raise pitch, though results vary. Many people combine surgery with voice training to get the best outcome, since pitch is only one component of how a voice sounds gendered. Resonance, intonation, and speech patterns all play a role that surgery alone doesn’t address.