Coalition Frontbencher Sussan Ley has joined calls for the Liberal Party to adopt quotas to increase the number of female MPs in the Parliamentary Party.

The Assistant Minister for Regional Development said while she hasn't historically been a fan of affirmative action policies like those adopted by Labor, measurements must be taken to increase representation.

Ley's calls come after former Deputy Liberal Leader Julie Bishop made similar calls for equal representation, as well as Liberal MP Julia Banks’ announcement she will not stand at the next election due to bullying during the leadership spill.