The answer will vary person to person, In my opinion you need to look at why you want to do it, if it's just to have a perfect child then its rediculous. I'm really on the fence with these topics as I understand not wanting a child to be teased or have bad self esteem but there are a lot of risks involved in any surgery,
what feels right for you? talk to a few specialists and doctors and find out exact details and risk percentages.
Then make a decision don't let anyone else make you feel bad for it