The purpose of this study is to measure the effects of hormone replacement therapy (HRT) on the female voice. Female individuals who are receiving hormone replacement therapy, which includes testosterone therapy, will be eligible to participate. We will track the pitch of these individuals' speaking voices during HRT in attempts to see whether HRT, specifically testosterone, can lead to changes in womens' speaking voices. We will be recruiting participants who have already received approx 6-9 months of HRT and compare these to age-matched individuals not receiving HRT. This is a cross-sectional study and we will give participants the option of continued follow-up for 9 more months to assess whether there are longer-term voice changes secondary to HRT. This could provide patients and medical providers with more information regarding the risks/benefits of pursuing hormone replacement therapy.