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Effect of danazol on vocal pitch: a case study
Obstetrics and Gynecology
|January 1, 1985
Summary
Danazol therapy for endometriosis can lower vocal pitch (fundamental frequency). This effect persisted for at least 12 months after treatment, suggesting a long-term impact on voice quality.
Area of Science:
- Gynecology
- Otolaryngology
- Speech Science
Background:
- Endometriosis is a chronic condition affecting women of reproductive age.
- Danazol is a medication used to treat endometriosis.
- Vocal changes can be a potential side effect of hormonal therapies.
Observation:
- Acoustic analysis measured fundamental frequency (voice pitch) in a woman undergoing danazol therapy.
- Measurements were taken before, during, and after the 5.5-month treatment period.
Findings:
- A moderate decrease in fundamental frequency was observed within three months of danazol therapy.
- Vocal pitch continued to lower throughout the treatment course.
- The lowered fundamental frequency persisted 12 months post-therapy, with only partial return to baseline levels.
Implications:
- Danazol therapy can cause persistent vocal side effects, specifically a lower voice pitch.
- The long-term impact on voice quality warrants further investigation.
- Patient counseling regarding potential vocal changes is important for managing expectations and treatment acceptability.

