What's next? Species?

New York may be trying to overrule nature.

Separating anatomy from what it means to be a man or a woman, New York City is moving forward with a plan to let people alter the sex on their birth certificate even if they have not had sex-change surgery.
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Under the rule being considered by the city’s Board of Health, which is likely to be adopted soon, people born in the city would be able to change the documented sex on their birth certificates by providing affidavits from a doctor and a mental health professional laying out why their patients should be considered members of the opposite sex, and asserting that their proposed change would be permanent.

What if you only "discovered" your new gender when you are in your 40s? Or like Anne Heche, you declare as a lesbian and then realize you were wrong? There isn't any real evidence to support this. People prefer to think they have been improperly assigned at birth, but I think it reflects their neurosis more than their actual sexuality. Gender is really a grammatical term, not a biological one. But it has now become popular to disregard biology in favor of psychology, or imagination. I'd like a little more evidence.