On Friday, a federal judge in Mississippi blocked a law that would forbid abortion after a fetal heartbeat is detected, which can be as early as six weeks into a pregnancy.
According to Judge Carlton Reeves, the law "threatens immediate harm to women's rights, especially considering most women do not seek abortions services until after six weeks."
So-called "heartbeat laws" have been introduced in 15 states so far this year and have been passed in four: Kentucky, Mississippi, Georgia and Ohio.
The Mississippi law was challenged by the Center for Reproductive Rights on behalf of the Jackson Women's Health Organization, the state's only abortion provider.
The law was previously set to take effect in July.