Do Oral Contraceptives Improve Vocal Quality? Limited Trial on Low-Dose Formulations

This is the authors' abstract. We don't add key points for this paper.

In Brief OBJECTIVE To evaluate the effect of low-dose monophasic oral contraceptives on female vocal quality. METHODS Acoustic voice parameters of six women who use oral contraceptives and six women who do not were evaluated repeatedly during the menstrual cycle. Frequency and amplitude variations were measured using a computerized voice analysis program. Repeated-measures analysis of variance was performed to test differences between groups for each acoustic voice parameter. RESULTS Vocal stability among the women who use oral contraceptives was significantly better than among those who did not use oral contraceptives (P < .05). Specifically, amplitude and frequency variations between successive vocal cycles were smaller in women using oral contraceptives in comparison with the control group (.24 dB versus .37 dB and .86% versus 1.27% for amplitude and frequency variations, respectively). CONCLUSION Contrary to the reports of adverse effects that high-dose pills have on voice, low-dose oral contraceptives show a favorable influence on voice in young women. Oral contraceptives were found to improve vocal quality and stability in young women, as measured by several acoustic parameters.