Washington (CNN) A federal judge on Tuesday blocked a Missouri ban on abortions after eight weeks from going into effect.

"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," writes US District Judge Howard Sachs in an 11-page opinion

"However formulated, the legislation on its face conflicts with the Supreme Court ruling that neither legislative or judicial limits on abortion can be measured by specified weeks or development of a fetus; instead, 'viability' is the sole test for a State's authority to prohibit abortions where there is no maternal health issue," Sachs wrote.

Tuesday's ruling comes after two other federal judges blocked similar abortion restrictions in Arkansas and Ohio earlier this summer, as a slew of state laws looking to challenge Roe v. Wade, the 1973 landmark ruling legalizing abortion nationwide, make their way through the courts.

The Missouri law in question would penalize medical professionals who perform abortions after eight weeks into a pregnancy -- before many women know that they are pregnant, and well before the 24-week viability standard established by Roe -- with up to 15 years in prison. The law does not include exceptions for instances of rape or incest, only for instances of "medical emergency," such to prevent a pregnant woman's death or "substantial and irreversible physical impairment."

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