Amendment 3 places language in the Missouri Constitution legalizing abortion up to fetal viability, which is usually around 24 weeks. Now that the amendment passed, abortion rights proponents plan to file lawsuits to strike down the state’s near-total ban.

Missourians voted to reverse the state’s strict abortion ban in the Nov. 5 election. Here’s when Amendment 3 will take effect.

Voters narrowly approved Amendment 3 on Nov. 5, which adds a “fundamental right to reproductive freedom” to the state constitution, threatening to undo decades of pro-life gains.