Indian Social system need change
Well, If we need to find the solution of Female Foeticide the first thing we need to find out is why Indian parents don't want a girl as a child ??
We Indians know many reasons, Gender bias related causes. The basic problem is in Indian Social system and Indian Society. The fundamental difference is something like business. When you invest, you like to get return. When you invest in son, it will give you return but when you invest in daughter, it will give return to others in future.
This mindset need to change. First thing, parents must be independent from both, Boys as well as Girls. Parents expectations that son will take care of them in old age and daughter-in-law will perform the family responsibility is wrong. Let them live their life and plan your old age on your own. Its different case that when parents are in need and children go an support them but it should not be a traditions.
Secondly, as boy's parents are responsibility of both guy and his wife, similarly girl's parent's responsibility is also on both. If girl's parents need financial support that girls must be allowed to support them even after marriage. Than parents will give the importance to girls education also.