Because the divisions are interconnected, WSL 1 teams face the risk of relegation for the first time in the league's history.
Starting places in both divisions were granted based on applications sent in by clubs, so Manchester City were able to enter its newly created women's team directly into the WSL 1.
The governing body announced it will partially fund teams in the league, awarding £70,000 to clubs in WSL1 and £23,000 in WSL2.
[4] Liverpool retained the title on goal difference, after they and Chelsea finished level on 26 points.
The Doncaster Rovers Belles challenged for promotion until the final day, due to a 2-1 win over Sunderland.