Not everyone who obtains a degree later chooses to enter their field of study. A degree also does not guarantee a job. This is yet another example of trying to misuse statistics as a form of confirmation bias.
Looking at statistics from this Slate article [0], since 2003 only <50%~ of Engineer PHD's are employed. What that means is that of those 22% CS PhDs roughly 11% would be the the number who are employed in the end assuming no gender discrimination beyond obtaining the degree.
Given the data is 3 years out of date, it's possible employment rate has jumped to 63% (the highest its been since 1998!) and that 14% is exactly on-par for the course for having no gender discrimination (against or in favor of) women. A more realistic estimate is that the employment rate is still at 50% or below and 14% is actually discrimination in favor of hiring women given less than 11% should be hired at current employment rates.
>First, to your (horribly sexist) implication that women opt out of the workforce by studying "Gender or Women's Studies": it isn't even in the top 10 majors for women.
It was one example of a major dominated by women that is useless for holding any of the jobs listed as "liked". They also "opt out of the Engineering work force" by majoring in Biology, Business, and Psychology and not Engineering if you feel that using Gender Studies was somehow sexist.
[0] http://www.slate.com/articles/business/moneybox/2014/07/empl...