I believe ftm transitioners stop all the hormone treatment when they decide to go through pregnancy in order not to harm the baby.
What makes me really quite angry about the whole thing is what it is doing to the terminology surrounding women. I have already been through an antenatal course where the written literature (although not the people who actually ran the course, thank goodness) insisted on referring to 'birthing parent' and 'birthing person'. American parenting websites frequently talk about 'pregnant people' and I note that the majority of these websites have a line to say that they were 'updated in 2020'.
Only one type of person becomes pregnant. Females. Specifically, older girls and women.
A pregnant transman is in no way 'living as a man'. Unless they take the view that a man is a tough person who fixes cars, while a woman is someone who likes pink sparkles and cries a lot. Which is more insulting than I can say.
And someone will be along shortly to tell me that ftm transitioners don't take this view, but will be unable to provide an alternative explanation as to what a transman considers a man or woman to be. (Yes, yes, an innate 'gender identity' which can never be explained or described using objective criteria.)
Anyway, all I know is that the word 'woman' is being stripped of its meaning; that by being described as a 'birthing person' I'm being reduced to a mere bodily process; and if I do continue to use the word 'woman' to describe myself, I feel as though I am making some sort of statement about my character, which the original definition of 'woman' never included.
I repeat: it makes me angry.