You better consult some vet. surgeon. I don't think you will get a sound advice from this forum! Furthermore, please do put detailed titles for your posts so that they don't look ridiculous as this one does.
I agree with some of the points suggested Mr. Kumar, that your title should be little descriptive. And it it doesn't look good in such a good site.
As far as milk giving capacity of cow is concerned that depends on breed of the cow and what diet is getting. If she is getting well balanced nutritious diet, then surely her milk giving capacity will increase.