As you may know, at Scarleteen we do not yet endorse suppressing menstruation/continuous birth control -- using a hormonal method of birth control in order to skip withdrawal bleeds/periods -- for women under 18, because there still is yet to be any study done or published with adolescent women to evaluate if it is safe or medically sound for those in that stage of physical development.
There is yet no available data concerning the long term effects of menstrual suppression on a woman's overall health, at any age. I should also mention that no studies have been published yet about the safety or efficacy of suppressing periods with the patch or vaginal ring.
However, there have been published and reviewed studies for women over 18 using oral contraceptives for suppression.
If you’re a regular at the main site, you may have already seen these two new articles: An Immodest Proposal by Heather Corinna and Let's Get Metaphysical: The Etiquette of Entry by CJ Turett and Heather Corinna. But if you haven’t gotten a chance to check them out yet, here’s a brief introduction to both.