A federal judge has issued a ruling to stay the FDA's approval of the abortion drug mifepristone, in response to a lawsuit brought by anti-abortion groups in Texas. The ruling invalidates the FDA's 23-year-old approval of the drug, and the groups have urged the 5th U.S. Circuit Court of Appeals to let the ruling stand. The case is likely to be taken to the Supreme Court, and the outcome could have a significant impact on access to the medication.