sexchanging

You know by improvement of science and knowledge has found some new questions. Finding useful answer for these questions is necessary.
One of those questions is the problem of sexchanging, which FOGHAHA (LEARNED) have talked about it within new questions.
Fortunately this argument, sexchanging, has known very well by Shiite Foghaha.
Some doctors say, one in a week change his or her sex.
I mean: by this action, if he is man he will become woman and if she is woman she will become man.
A lot of surgical operation of exchanging have took placed in a lot of countries both Moslem and no Moslem countries.