This woke idiot is conflating rare defects to "transyouth". First, the portion of science he references does not yield boys and girls who are confused about their gender. Second, I know of not one "transyouth" or "transadult" who has one of those rare defects. They are all biologically male or female, without question. -- contrary to his misleading statements.
As a former biology teacher, I can state unequivocally, that there are only boys or only girls, not withstanding the rare defects which do NOT lead to mental gender confusion.