abnormal uterine bleeding
"Absolutely brilliant.  I only asked the doctor for a break from heavy periods for my 2 week summer holiday.  She suggested that long term I should consider the Mirena.  It has changed my life.  I had it inserted in August and have had very light one day periods every month since.  No cramping or flooding, no headache beforehand and still regular.  I did notice swollen breasts for a few months but this has settled.  Am 39 now and wish I had found out about Mirena ages ago."