>“What you are seeing in a number of systems, other developmental systems, is that the sex differences are shrinking,” Swan told me. Men are producing less sperm. They're also becoming less male.

Is it possible that these phenomena relate to the seemingly explosive rise in transgenderism? Particularly MtF, which is much more common than the reverse. Perhaps for those with already low male:female hormone ratios, if they are tipped further by these endocrine disruptors, especially during development, they might really have a brain that feels more female.