 [ Symptoms ] my son has a history of azthma now has croup [ Disease ] hi i found this nice piece of info that may help missed menstrual periods about 2 out of 10 women stop having periods after 1 year of mirena use your periods come back when mirena is removed if you do not have a period for 6 weeks during mirena use contact your healthcare provider to rule out pregnancy its from this site <link> hope this helps you good luck