http://www.medications.com/effect/view/22874 I am still trying to figure out all this yasmin stuff. I am the one whose 13 yr old daughter was given yasmin as sorta a favor because she was having long periods. It seem to me that yes, yasmin or yaz whatever the difference is works well for lots of peo Thu, 16 Aug 2007 07:08:29 -0400 http://www.medications.com/effect/view/22874?item=1240 There may be something else that is causing your daughter not to have periods such as PCOS, which can cause missed periods. I have been on birth control specifically to control this and when I am not on a pill, I go months, without having one. I ca http://www.medications.com/effect/view/22874?item=1240