This is actually very high internationally, I wonder why? USA doesn't have particularly high ratio of women in undergrad (they are more than men there as well, but women outnumber men in undergrad in basically every country), so it isn't that they have more women as a base, they just get more women into grad programs. Could international students be the cause?<p><a href="https://www.scientificamerican.com/article/how-nations-fare-in-phds-by-sex-interactive1/" rel="nofollow">https://www.scientificamerican.com/article/how-nations-fare-...</a>