WASHINGTON - The Supreme Court on Monday turned down Arizona's bid to limit how doctors prescribe drugs commonly used in early abortions.

The justices, in an unsigned order, dismissed an appeal from Arizona state lawyers and let stand a lower court's ruling that blocked the abortion regulation from taking effect.

The court's action is the latest showing the justices are skeptical of strict new state regulations on abortion, or at least unwilling to confront the issue now.

In October, the court blocked Texas from enforcing part of a new abortion law that would have required all abortion clinics to meet the standards of an ambulatory surgical center. Lawyers for the clinics said this rule, if enforced, would have closed most of the state's remaining abortion facilities.

In the last decade, women seeking an early abortion have increasingly relied on drugs rather than surgery. Doctors have prescribed two drugs-mifepristone and misoprostol-which taken together can bring about an abortion during the first nine weeks of a pregnancy.

In 2012, however, antiabortion lawmakers in Arizona adopted a law requiring doctors to follow the "protocol" set by the Food and Drug Administration when it approved these drugs. They said they did so to "protect women from the dangerous and potentially deadly off-label use of abortion-inducing drugs."

Under the Arizona law, doctors could have prescribed the drugs up to only seven weeks of a pregnancy. And the product label called for prescribing far more of the first drug - mifepristone - than is commonly used now.

Medical experts say such off-label use of a drug is common and reflects the latest available information about how a medication is best used.

Planned Parenthood and an Arizona doctor challenged the restrictions, contending the law put an "undue burden" on women seeking abortions.

The U.S. Court of Appeals for the Ninth Circuit blocked Arizona's law from taking effect in June. "Arizona has presented no evidence whatsoever that law furthers any interest in women's health," wrote Judge William Fletcher.

Arizona Attorney General Thomas Horne appealed, arguing that the law left women with the option of obtaining a surgical abortion.

But without comment, the court said it would not hear the case of Humble vs. Planned Parenthood.