Adding the actual FDA link since it’s not behind a paywall. Looks like they’ve looked at data going all the way back to 1973 to assess the efficacy and safety of the dosage. That will be an important bit of knowledge when the inevitable lawsuit comes out “because the FDA didn’t do their due diligence.”

[https://www.fda.gov/news-events/press-announcements/fda-approves-first-nonprescription-daily-oral-contraceptive]