Thee is always inherent bias, some positive some negative. If one start to state human are bipedial, and you object saying some are born without leg, some lose them later in life, some are in rollchair, you missed utterly the point. Biologically human are bipedial mammals, and as with all mammals have two sexes. There may be uneasy cases but they are all pathological. That is an important point.
You want to bring more to the conversation, like gender identity, and feel free to this, but sex is far more clear cut. The individual in the op, was pregnant, and gave birth. There is nothing more clear cut than that. Now by CHOICE they may chose the GI of male and by choice we may chose to call use man, he, his, but there is nothing mor eclear cut in this case they are biologically female.
There may be bias against TG for various reason, but keep in mind you bring your own bias the othee way around when you refuse to admit that people may have a point that she is a surgically changed female a (TG) man. Note how the first part of the sentence is about sex, the second GI.
And no, bringing pathological cases like kilfner syndrom does not make a better case that sex is murky like gender.it only serves to illustrate thatthose cases are pathological, contrary to the case inop which is pretty clear : the person ws born a fertile female and changed it surgically. Pretending that peoplehave "bias" or as i sawin other thread "phobia""icky factor" only illustrate your own prejudice.
Thatsaid would i be before that person would i call her"she"? no,politesse etc...but in common conversation talking about the case, i have no qualm saying it was a female, a pregnant female.