[kerpele]

Okay, I looked it up and apparently CS is the only stem field where there seems to be significant bias (https://blogs.helsinki.fi/edu-kumpula/2019/10/10/faculty-of-...)

[ptaipale]

The correlation of women in STEM graduates and Global Gender Gap index is negative: the higher gender equality, the lower the proportion of women graduating from STEM subjects.

Possible reasons are considered in The Atlantic: https://www.theatlantic.com/science/archive/2018/02/the-more...