Cologist, I would echo your sentiment of disappointment and embarrassment at the lack of knowledge and understanding of the ob/gyn community and, here, of future ob/gyns. Calling this patient an "a-hole" is ridiculously unprofessional. Calling him "selfish" for choosing to have biological children is absurd as an Ob, whose job it is to help people through their biological pregnancies (REI is a booming business for both straight and queer couples, and no one would question a straight male-born-male for wanting to have biological children either). To refuse to correct pronouns or continually referring Mr. Beatie as a "woman" shows a complete lack of respect for the patient in general. And it's even more enraging to hear people say you'd be his doctor because "it's a great case," albeit "awkward." Patients are not sideshows to be fascinated or bewildered by.
While GID may in fact prove to have a biological basis (I haven't yet read those studies--I will), I think it's irrelevant. Gender (how one identifies along the spectrum of masculinity/femininity) is separate from genital/phenotypical sex, which is sometimes also distinct from chromosomal sex (as in AIS). Even if gender identity (in this case, acting masculine in character and identifying as male) is chosen/performed/constructed and not a "medical condition," and even if a person chooses to take surgical/medical means to align their sexual phenotype (testosterone, top surgery)---it doesn't and shouldn't preclude them from wanting to have biological children within their means. Indeed, arguing that gender is "chosen" (even when rigidly adhered to through sex-reassignment surgery) implies fluidity...and allows for fluidity in its expression. If he is comfortable being pregnant, he has the right to do so--regardless of his wife's fertility, his deepened voice, or his androgenic hair patterns.
I understand this in new and strange for most people (the lay public and docs alike), but would hope that all of us learn how to compassionately treat all of our patients, no matter how bizarre or unsettling we might find them at first. Our concern should be for the patient's health and well-being--and that starts by understanding them and meeting them where they're at, even if that's confusing or difficult. It's our responsibility as physicians to learn about our patients when we, at first, don't understand. The fact that many of the first impulses of people here was to be disgusted or angry or self-righteous makes me lose faith in my future colleagues.