Will we see an increase or decrease in a number of female US Senators in 2018?

[nkpolitics1212]

Number of female US Senators
1)AK-Murkowski-R
2)CA-Feinstein-D
3)CA-Harris-D
4)HI-Hirono-D
5)IL-Duckworth-D
6)IA-Ernst-D
7)ME-Collins-R
8)MA-Warren-D
9)MI-Stabenow-D
10)MN-Klobuchar-D
11)MN-Smith-D
12)MS-Hyde Smith-R
13)MO-McCaskill-D
14)NE-Fischer-R
15)NV-Cortez Masto-D
16)NH-Shaheen-D
17)NH-Hassan-D
18)NY-Gillibrand-D
19)ND-Heitkamp-D
20)WA-Murray-D
21)WA-Cantwell-D
22)WV-Moore Capito-R
23)WI-Baldwin-D
Incoming female US Senators
1)AZ- Sinema-D
2)NV-Rosen-D
3)TN-Blackburn-R
Outgoing female US Senators
1)MO-McCaskill-D
2)ND-Heitkamp-D
+1 to +3 increase in female US Senators depending on what happens in MO and ND.