Queensland's LNP will allow its members to vote according to their conscience if Independent MP Rob Pyne's bill aimed at decriminalising abortion makes it through the committee process.

Labor has had a conscience vote policy on the issue since the early '80s.

That hasn't helped lift the procedure from the state's criminal code, where it has sat since 1899.

Instead, it has been amended to provide what lobbyists such as Children by Choice label as "ambiguous" protections for medical professionals. Women can still be prosecuted under criminal code for attempting to procure an abortion, unless their doctor deems it necessary for health reasons.