A Missouri judge on Friday ruled against an abortion rights measure set for the November ballot, a decision that throws the proposal’s fate into uncertainty.

Judge Christopher Limbaugh of Cole County Circuit Court sided with pro-forced pregnancy lawmakers and activists who had argued that Missourians for Constitutional Freedom had not sufficiently explained the ramifications of the Right to Reproductive Freedom initiative, or Amendment 3, which would overturn the state’s near-total abortion ban.

A Missouri judge on Friday ruled that an abortion-rights campaign did not meet legal requirements to qualify for the November ballot, potentially thwarting a yearslong effort to undo the state’s near-total abortion ban.