So people say the voice doesn't change, and from my personal experience, it REALLY changed, I started taking stuff since I was 16, and I say stuff because when I was -18 that I was unable to get treatment I'd just take anything that had estrogen.
But anyway, the thing is that as a matter of fact my voice changed with the years, I was extremely surprised and freaked out because I was told it was impossible, but yes it did, and I got no training at all.
Okay maybe the vocal chords didn't change, but does the voice really depend only on that? as a musician I know that even the littlest change can make a note sound higher or lower. Like when you get a flu and your voice lowers, you can even hear that people fluctuates their voice pitch during the day, with no effort at all.
Come on, there must be more people who got this to happen too.