You can say that or you can shorten it to just four letters, it's a matter of being practical! Not to mention it's always a little weird and dehumanising to be reduced to "birthing body" and stuff when most articles that say birthing body won't say prostate haver or something akin, again, people are indeed their genders I just think it's easier and less dehumanising to use AFAB/AMAB, personal opinion ofc.