"i was on kariva for over 3 years and loved it.  had no problems and a regular period.  however, i had to switch to microgestin because kariva isn&#039;t readily available in my state, i would have had to order out.  according to my doctor the closest birth control to kariva was this one.  it really scares me.  i&#039;m on my third pack and my periods have been significantly lighter, and that&#039;s awesome.  but they weren&#039;t nearly as regular as they used to be and this is the second time i&#039;ve experienced bleeding in between periods while on this birth control.  stressful indeed! i&#039;m not so sure how long i want to stay on microgestin, not a fan of the in-between bleeding."