For those who still believe it's a feminist conspiracy, I encourage you to read this brief report (with links to an excellent full report) with hard numbers on the experience of women in STEM: https://hbr.org/2015/03/the-5-biases-pushing-women-out-of-st...
And if you think you're above bias, or that it doesn't exist against women, please challenge yourself with the unconscious bias test: https://implicit.harvard.edu/implicit/takeatest.html Stats are available after the test. I am a woman with a PhD in a STEM field, and guess what - I have biases against my own sex.