How to ask to shave? (For girls)?

Don't be scared, every girl shaves. Tell your mom directly, I did the same thing and she completely ignored me. I started at thirteen. Just say "Hey mom, I think it is time that I should start shaving my legs, I don't like my leg hair and all girls my age are shaving their legs. In gymnastics my underarm hair, leg hair, and my other hair will be revealed and I am uncomfortable about that" I think she will understand, good luck!