Facing a surge in demand, retailers limit emergency contraceptive purchases and deliveries.

CVS temporarily set a three-pack purchase limit to ensure “consistent supply on store shelves,” and Walgreens said it was pausing deliveries.

As people bought up Plan B and other emergency contraceptive pills after the Supreme Court’s decision overturning Roe v. Wade on Friday, at least two major pharmacies put limits on purchases or deliveries of the pills, which typically cost $10 to $50.

CVS said it would temporarily cap purchases of emergency contraceptives at three packs “to ensure equitable access and consistent supply on store shelves.”

On its website, Walgreens said the product was available for pickup in stores on Monday, and a spokeswoman said purchases were not being limited at this time. But the pharmacy said it would temporarily stop delivering the contraceptives to customers’ homes.

“Walgreens is still able to meet demand in-store,” the spokeswoman said in an email, adding, “We are working to restock online inventory for ship-to-home.”

Kroger’s website said its Plan B stock in its supermarkets was low. The company did not respond to a request for comment. Amazon’s website had various emergency contraceptives available, but most of them not for delivery before mid-July. The company did not immediately respond to an email asking if the fulfillment times were unusual.

Walmart, which had limited some purchases of the pills, said in a statement: “Many of our products have online purchase limits in place. During times of fluctuating demand, these limits may change.”

Birth control is legal in the United States, but some legal experts have warned that legislators will use abortion bans to limit access to contraceptives.

Morning-after pills can temporarily interfere with ovulation and prevent pregnancy if taken within 72 hours of sexual activity. Some companies that sell emergency contraception said sales jumped significantly after a draft ruling that was leaked last month revealed the Supreme Court was likely to overturn Roe v. Wade, ending federal abortion rights.

Abortion pills, which are different from emergency contraception and were used in more than half of recent abortions in the United States, have also become more sought-after since Friday.