I'm thinking about switching over to four weeks in, one week out for my Nuvaring, as I hear that is completely legal. My question is, does it reduce effectiveness in any way? During my research, I read something to the effect that the hormones are not as strong in the fourth week. If that's true, does that mean effectiveness is reduced? The website is completely committed to the 3 in, 1 out and I figure calling will get me that same answer.