This document discusses modifications made to oral contraceptive regimens to address issues with the standard 21-day regimen that includes a 7-day hormone-free interval. Specifically, it discusses how reducing the hormone-free interval or supplementing it with low-dose estrogen pills can help suppress ovarian follicle development and prevent problems like breakthrough bleeding. The experts describe how our understanding of ovarian physiology informed the development of extended-cycle regimens and the importance of consistent pill-taking, especially during the first week after the hormone-free interval.