This is an interesting summary of some American research into pregnancy in transmen. They include those who've changed their 'gender marker' from F to M and those with a diagnosis of gender dysphoria (would this include some non-binary women?)
Particularly interesting to me was the fact that only 0.07% of deliveries was to this group, so a very small percentage, and that's in America. It's baffling to think of the accommodations some people want to make for this group at the expense of women's experiences given how unusual it is in the first place.
Also interesting was that some medical insurance companies appear to remove birth related coverage if a woman changes her marker from F to M. Does this apply to other female specific conditions? Mind boggling either way. Do they genuinely believe they've changed sex, or, call me cynical, is this a handy cost saving exercise?
I note this study does not include foetal outcomes, including miscarriage, or the potential health impacts on the children of these pregnancies of testosterone exposure.
www.medscape.com/s/viewarticle/993939