"i was on yaz for a year and a half, and then decided to switch to loseasonique so that i would only have 4 periods a year.  big mistake!!  i am switching back to yaz because of the side effects of loseasonique.  on yaz, i always knew when my period would start, and it was only about 3 days.  it also helped with my awful cramps.  i had no bad side effects from yaz at all.  i would definently reccomend it, but know that every pill has a different effect on each person."