I know it's silly to even take such arguments earnestly but I will because the affected helplessness around language is just annoying and I'm provoked: If a girl gets pregnant, she's a mother and "maternal" circulation will do just fine. Same for the "trans man". If a woman doesn't get pregnant, then I guess "circulation" will suffice if that's what we're talking about. "Inclusive" language is ameliorate redefinition that is not designed to be precise, but to shift meanings to support certain political ends, which in this case is equivocating between the old meanings of "man" and "woman" which are fixed to sex but full of meaningful content, and people's self chosen identities, which are largely without meaningful content.