Strumplesiltskin & Materialist (your points intersect, so instead of answering twice I'll group my response to you both together) - So, it's the sex you were assigned at birth that matters then? Isn't that a rather large decision to leave to a cursory glance by a midwife? Previously you stated that it was genitalia and/or chromosomes. It seems like your definition of woman isn't immutable either.
I'm absolutely not saying that an intersex person and a transgender person are the same. I only mentioned intersex examples to illustrate that biological sex alone can't be used to define woman or man.
I'm not really sure what the prevalence of one specific intersex condition has to do with anything (you're out by a couple of orders of magnitude by the way, or expressing percentages in that strange American style). Intersex people either exist, or they don't. We all know that they do, don't we? You also picked an intersex condition with an extremely low prevalence as your statistical example. If you were to cite the established figure of 1.6% of the population having some form of intersex condition, then the biological truth that sex is not a simple binary is a lot harder to ignore.
Binglebong - I think it's the members of this forum who erase intersex people, for exactly the reasons stated above.
AlmondCandle - I should clarify that I was talking about reproductive organs, rather than genitalia.
I said previously that I struggle to define the word woman. I'm clear that it includes transwomen though. I know that very few, perhaps any, people in this group share that opinion. In my defence, NZ law doesn't seem to have a single cohesive definition of what female means either.
I actually share a lot of your concerns about self identification. Given that, as the linked piece on Stuff said, we are 'behind' several other countries on this legislation perhaps that could provide an opportunity to measure whether some of the fears being expressed here have any grounding in fact. That might enable a more informed decision.