I have always been profoundly disturbed by the terms <assigned>  and <reassignment> in this matter of gender and person-hood.   Both terms suggest a rather haphazard AUTHORITY figure who slips-up from time to time, or intervenes in some specific manner (with or without malice aforethought)  which may, or must, then be acknowledged or corrected.

It is this frame of assignment / reassignment that invites such vituperative discourse.  Left handedness happens, green eyes happens, Ginger-headedness happens ; if we cannot see that these things are blessings, that is our problem, not  God's or the chance that brought these or other traits together in utero.  

Somewhere, St Thomas teaches that <birth anomalies> are not a sign of God's displeasure with the child or her parents, but they are allowed to happen to teach the human community important object lessons in compassion, practical mercy, love.

Did God actively will Thalidomide, does God will Spina Bifida?  Maybe Transgender happens too.