I was on Mirana for just about 5 years. I started getting light periods again so I decided to have it taken out middle of April. I got a period April 20th nothing in May and then I got one June 1st and July 3rd. Now I'm pregnant! We were trying and payed close attention to my cycle and ovulation days. I thought it would take much longer because of the Mirena but everyone is so different you just never know.