The Arizona supreme court on Monday granted a motion to stay the enforcement of an 1864 law that bans almost all abortions, a win for reproductive rights activists in the swing state.

The state’s highest court agreed to the Arizona attorney general Kris Mayes’s request for a 90-day delay of the near-total ban, further pushing back enforcement of the 1864 legislation after a repeal of the ban was passed earlier this month.

The stay will last until 12 August. A separate court case on the legislation which granted an additional 45-day stay means the law cannot be enforced until 26 September, Mayes said in a statement.

“I am grateful that the Arizona supreme court has stayed enforcement of the 1864 law and granted our motion to stay the mandate in this case for another 90 days,” she said.

Mayes added that her office is weighing the “best legal course of action”, including a petition to the US supreme court.

The latest decision comes two weeks after the Democratic Arizona governor, Katie Hobbs, signed a law to repeal the ban.

But the most recent repeal can only take place 90 days after the Arizona legislative session ends, possibly allowing for a small window when the ban could be enforced.

Last year’s session ended on 31 July, NBC News reported. If lawmakers adhere to that timeline, the ban could be in effect for approximately a month, until late October.

Hobbs has said that she will not prosecute any medical practitioners under the 1864 law.

The Arizona supreme court rejected a motion from Planned Parenthood Arizona on Monday to hold off on enforcing the 1864 ban until the repeal takes effect.

On the latest court ruling, the reproductive health organization vowed to continue fighting to “[ensure] all Arizonans can access the care they need in a safe, caring environment”, according to a statement.

“We will not be intimidated or silenced by anti-abortion extremists, because our bodies and our autonomy are at stake.”

In Arizona, abortion is currently banned after 15 weeks of pregnancy. The 1864 abortion law bans nearly all abortions, except to save a woman’s life. The US civil war-era law does not make exceptions for rape or incest.

Residents of the swing state will probably vote on a referendum on abortion come November after a coalition of reproductive rights organizations collected enough signatures to get the issue on the 2024 ballot.