A federal judge has temporarily blocked a Missouri law banning abortions after eight weeks, one of the most restrictive proposals nationwide.

"The various sections specifying prohibitions on abortions at various weeks prior to viability cannot be allowed to go into effect on August 28, as scheduled," U.S. District Judge Howard Sachs, a Carter appointee, wrote, per The Hill.

The block comes almost three months after a federal judge blocked a Mississippi law which bans abortion after the detection of a fetal heartbeat, as early as six weeks into a pregnancy.

Judge Carlton Reeves said the law "threatens immediate harm to women's rights, especially considering most women do not seek abortions services until after six weeks," in the preliminary injunction.

"Allowing the law to take effect would force the clinic to stop providing most abortion care," wrote Reeves, adding that "by banning abortions after the detection of a fetal heartbeat, the law prevents a woman's free choice, which is central to personal dignity and autonomy."

The bill, which follows similarly restrictive laws recently passed in Alabama, Georgia, and Missouri, was set to become state law on July 1.

"Here we go again," Reeves wrote in at the time. "Mississippi has passed another law banning abortions prior to viability. The latest interpretation (Mississippi's new law) bans abortions in Mississippi after a fetal heartbeat is detected, which is as early as 6 weeks."

Reeves added that he had struck down a 15-week ban on abortions just six months ago, saying the state legislature's even stricter law "smacks of defiance."