"Women are always less likely to choose a STEM program, regardless of mathematical ability. Among those who went to university, 23% women in the three highest categories of PISA scores (out of six) chose a STEM program, compared with 39% of men in the three lowest categories of PISA scores."
It makes me think about WHY they might be "choosing" other fields. If it is truly because they are not interested and that is based on a somewhat educated view of what it actually is then I'm fine. If it is because they feel like they aren't "smart enough" then I think they need to take their queue from the 39% of men referenced in the quote and just go for it.
https://www.statcan.gc.ca/pub/75-006-x/2013001/article/11874-eng.htm