Missouri activists are throwing support behind a constitutional amendment to restore abortion rights while also allowing the procedure to be restricted in later stages of pregnancy.

A Missouri abortion-rights campaign announced Thursday that it’s throwing support behind an amendment that would enshrine access to the procedure in the state constitution while allowing restrictions in later stages of pregnancy.

Missourians for Constitutional Freedom said it is committing to a proposal, one of 11 versions, that would let lawmakers regulate or ban abortion after what’s called viability, with an exception for the protection of the life and physical and mental health of the woman.

Supporters include the ACLU of Missouri, local Planned Parenthood affiliates and Abortion Action Missouri.

“Missouri’s cruel and restrictive ban on abortion is tying the hands of doctors and preventing necessary care,” said Dr. Iman Alsaden, an adviser to Missourians for Constitutional Freedom and chief medical officer of Planned Parenthood Great Plains, in a statement. “Today, Missourians are taking a critical step to make their own medical decisions and kick politicians out of the exam room.”