One thing that's not really talked about is the problem (UK based) detransitioners face when trying to revert back to their legal sex. Once you've got a GRC in your "aquired gender" they don't allow you to return to your original birth certificate in the UK birth register.
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I am stuck in this "gender recognition register". If I want to be legally female again I am forced to apply for a 2nd GRC as if female is now my "acquired gender"
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