WASHINGTON (AP) - The Food and Drug Administration on Thursday permanently removed a major obstacle for women seeking abortion pills, eliminating a long-standing requirement that they pick up the medication in person.

Millions of American women will now be able to get a prescription via an online consultation and receive the pills through the mail. FDA officials said a scientific review supported broadening access, including no longer limiting dispensing to a small number of specialty clinics and doctor’s offices.

But prescribers will still need to undergo certification and training. Additionally, the agency said dispensing pharmacies will have to be certified.

The decision is the latest shift in the polarized legal battle over medication abortion, which has only intensified amid the disruptions of the COVID-19 pandemic. It is certain to spur legal challenges and more restrictions in Republican-led states.

Earlier this year the FDA stopped enforcing the in-person requirement because of the pandemic. Under Thursday’s decision, the agency permanently dropped the 20-year-old rule, which has long been opposed by medical societies, including the American Medical Association, which say the restriction offers no clear benefit to patients.

The FDA’s latest scientific review stems from a 2017 lawsuit led by the American Civil Liberties Union, which argued that the agency’s restrictions block or delay medical care, especially for people in low-income and rural communities.

The ACLU hailed the elimination of the strictest requirements but said regulators should have gone further and allowed prescribing by any physician and broader pharmacy dispensing. Abortion opponents said the FDA decision would result in more drug-related side effects and complications for women.

Physicians who prescribe the drug, mifepristone, will have to certify that they can provide emergency care to deal with potential adverse effects, including excessive bleeding, FDA officials said Thursday.

The change still means many more doctors will be able to write prescriptions and American women will be able to fill their orders at far more pharmacies, including via online and mail-order services.