I wonder if the sex correlation would go away if they controlled for digit ratios? https://en.wikipedia.org/wiki/Digit_ratio https://en.wikipedia.org/wiki/Digi

I wonder if the sex correlation would go away if they controlled for digit ratios? https://en.wikipedia.org/wiki/Digit_ratio https://en.wikipedia.org/wiki/Digit_ratio When I started reading that they talked about sex hormones differentiating at 8 weeks and I was thinking that we'd have to throw out a lot of things we thought we knew about sexual development if they'd actually seen differences before that but, no, it was was later that this was measured. It would be nice to have some notion of the effect size. That is, what fraction of female infants would have more FC-GA connection than the typical male. I'd bet that the dimorphism here is smaller than, say, height dimorphism but I wouldn't try guessing by how much.