I don't think there was a lack of women, but perhaps lack of media coverage, and in the results, a number (not sure of the figures, but Lib Dems had several) were not elected, unfortunately.
It needs a 50:50 mix in Parliament, but until working hours and other aspects change (and the public are willing to accept change), and some "leaders" are more accepting of women, nothing will change.
Perhaps with P.R. there will be a chance of more women. I seem to see quite a number in the Welsh Assembly on BBC Parliament TV, and there are plenty of local councillors, so it needs change "higher up" doesn't it.