Well by the definition quoted in that article, turns out I’ve been quite wrong after all these years then. Humans do change sex quite naturally and gradually, for example with puberty and with the menopause. My chin and upper lip is proof!
Little did I know but I’ve been transitioning my sex back and forth for years now. I was definitely a girl child but then since puberty I’ve always had a bit of a ‘tache, so as a man I had those miracle babies, that was probably a worlds first (but hey who’s counting there’ve been a lot of those firsts reported
). Then post-kids and what with balancing childcare with the job and whatever, I think my moustache was just too tired to grow back. so I guess I was a proper woman then.
However now with the meno the tache and chin is stronger than ever before so I am fully male. I have to say I didn’t even notice how male I was getting till I got these new glasses!
I’ve press released all this fluctuating between the sexes to a few journalists with some quotes just in case they want to pop round for a quick ‘worlds first’ photoshoot. Not heard back yet but I’ve tidied up the living room just in case.
I haven’t yet told DH and the boys that every time they shave they become female, but I’ll run through that with them affirmingly and hopefully by the time the photographers arrive we can all be in the pics together as one big happy headline-grabbing family. 
I know not everyone would involve the media in these things but Christmas doesn’t pay for itself and that massive cheque from the extreme far right seems a bit slow in arriving..