Sex DNE Gender!

Cool article "How Boys Become Boys (and Sometimes Girls)" by Scientific American about how embryos slated by X and Y chromosome allotment to become boys instead develop into girls (welcome - more girls!), and sometimes vice versa.

If Sox9 is somehow switched on in a genetic female—an embryo with two X chromosomes—it causes male gonads to form; if it fails to turn on in males, the cells it controls will become follicle cells, which mature into ovaries."

My only qualm is that, though it appears that this study and article have just as much potential application for how "Girls become girls (and sometimes boys)", this reciprocity was really only seen in one sentence in the article. I know, I know, gene expression anomalies cause genetic boys to become girls much more often than girls become boys (more X chromosomes have more control that just having one Y chromosome). But the study looked at both - how (genetic) boys become girls, and how (genetic) girls become boys. To me, the framing of this article is too reminiscent of recent studies about effects of stress on women during pregnancy on a child's gender, and how this was portrayed "we still don't know how to advise women in how to make boys". Chilling.