So Hagan and Landrieu lost to men, while Ernst and Capito won to replace men.
Currently, two female senators are retiring in 2016 (Boxer and Mikulski), where there is at least one woman running to replace them. Both Murkowski (R-AK) and Kelly Ayotte (R-NH) are running for re-election. If these seats stay in women's hands, then the number of female senators stays at 20.
For some speculation:
Synema or Kirkpatrick might run against McCain in Arizona
Duckworth or Bustos might run against Kirk in Illinois
Hagan or Cowell might run against Burr in North Carolina
Those seems to be the likeliest three seats to flip from a male to female, keeping the original four incumbents as female seats, in my opinion.
Your thoughts?
Probably, Duckworth replacing Kirk and Kamela Harris replaces Boxer.
Net 1 woman senator because Van Hollen most likely will beat Edwards.
I think Dems will net 4-5 seats, which is OH, Pa, WI and IL. Keep CO and NV.
But, unless the House flips, most likely outcome.