Good evening, My question is regarding my menstrual cycles. I have the Mirena IUD, am on my 2nd one, and have had it for about 2 yrs. I had the first one for 5 yrs. without issue. My periods are generally regular, sometimes I skip a month, and they are typically very light and only last about 4 days. Over the past few months I have noticed my periods becoming more frequent and lasting longer, so I started tracking in May. I had a 24 day cycle in May, 21 day in June and 16 day cycle in July....I actually just finished an 8 day period on July 8 and started having dark brown discharge again yesterday! I will be 40 yrs old in 2 weeks-could I be experiencing peri-menopausal symptoms or could this be related to my Mirena iud or should I call my gyn? Thanks so much for any information you can give me.