2014 National Exit Poll: Women
Women 2014: 51% of electorate | 51-47 for Democrats +4
Women 2012: 53% of electorate | 55-44 for Democrats +11

On the flip side, look at how men voted. They turned out as a larger share of the population and voted for Republicans by a much greater margin.

2014 National Exit Poll: Men
Men 2014: 49% of electorate | 57-41 for Republicans +16
Men 2012: 47% of electorate | 52-47 for Republicans +5

The marriage gap: More important to Democratic hopes than women overall are unmarried women. They generally vote 2-to-1 for Democrats, while married women have trended more Republican. In this election, unmarried women were 21 percent of the electorate, mirroring their 2010 and 2006 midterm turnout and down from 23 percent in 2008 and 2012. And their margin for Democrats was down 14 points from the 2012 presidential election.