Its all getting a bit daft now this gender business. Whats so difficult to understand that there are (in most animals) just two genders MALE or FEMALE and you don't get to choose what you arrive as - this is set in stone and irrespective as to how well someone with the help of surgery/hormones manages to swap gender, at the end of the day a man is not going to give birth (its 100+ years way if at all) and a woman isn't going to get another woman pregnant.
If they wish to create a new words for a man who identfies as a womain, a woman as a man, a man who can't decide, awoman who can't decide then go ahead but leave the well established and legal word gender alone.
Reminds me of this
I'm pleased to see you have researched the topic so thoroughly. I'm also confident that there is no way you can have missed anything.