NEW YORK — The rollout is underway for Opill, the first over-the-counter birth control pill approved in the United States, and online sales began Monday morning.

Consumers can start ordering Opill online Monday, and orders will be fulfilled within a day or two, Sara Young, senior vice president and chief consumer officer at Perrigo, said in an email. So far, the product will be available at Opill.com and Amazon.

“Because privacy is important to Perrigo, Opill orders will be sent in plain, unbranded boxes,” Young wrote.

Opill has a suggested retail price of $19.99 for a one-month supply, $49.99 for a three-month supply, and at Opill.com, a six-month supply will be available for $89.99.

Earlier this month, the first shipments of Opill were sent to distributors, major drug stores and pharmacies — but as those shipments make their way through the distribution pipeline, it can take days to weeks before customers are able to get their hands on the product.

That timeline includes shipments arriving at distribution sites and then being delivered to retailers, and then the retailers either packaging the product for online orders or placing it on store shelves.

Some major retail pharmacies, such as CVS and Walgreens, have said they will offer Opill once they receive their shipments.

“Opill will be available at CVS.com and through the CVS Pharmacy app in late March,”  a CVS spokesperson wrote in an email. “In early April more than 7,500 CVS Pharmacy stores will offer Opill and for added privacy and convenience, customers will be able to choose same-day delivery or buy online and pick-up in store.”