No need to be worried.
I have lived happily for 30 years now with a 35 cm + difference in the legs, short femur and underdeveloped hip. I have no pain or other effects, and I have always done everything I wanted. For life reasons, I am now pursuing a nursing degree, and I hope it will go as well as my previous profession. I always finished first in my class in every school/university I went to. I was never teased or bullied.
Just on a note - I never wanted a surgery of any of the types my parents researched very eagerly. Please do consider your child's wishes! We are not "incomplete"!
The most important thing you can do for your child, is to let him/her know that he/she is loved, is complete, and has your full support. I know quite a few exceptional people like us - and not one who has not done well in life (all according to his/her own standards, of course).
All the best to you all.