Yes, he is a biological female, identifying as a male, who is pregnant. I have seen several such patients in my career. If they have had top surgery, breast feeding is off the table, and the hormone regimen may have to be modified, but otherwise, it is managed as any other pregnancy.
I am always amused by these discussions but almost never get involved in them. It would appear, under even the most casual independent examination, that gender "smudging" seems to occur across almost all cultures and almost all history.
Pardon my tentative conclusion, therefore, that the real "science" ( wisdom, knowledge ) is that this "smudging" is a natural fact.
It is, indeed, the reality.
Some of us deal with the reality in a rational manner, but some of us "Karen" our way through it even though
for the most part it's none of our actual business.
Long ago I decided that for the most part, and barring actual harm, a person could go to either heaven or hell as fast as they wanted, in their own brand of handbasket, with whatever parts they added or subtracted and it's none of my business.
One could stretch things to make specious claims that it is indeed one's business, but at root and fount, it usually isn't.
Terry