South African Runner:

[NYCSkin]

I am guessing that she has some degree of androgen insensitivity and is genetically a man. Therefore, in my opinion, she would be unable to compete as a woman.

The issue here is whether or not she (or her manager) knew she had this condition prior to competing. If so, she should be stripped of the medal. Otherwise, she can keep the medal but likely not compete further with other women since she will have an unfair advantage IMO....