Question: how long does your period last after mirena insertion?
Answer: Irregular bleeding/spotting can occur for 3-6 months after the insertion of a Mirena or Kyleena. Some users stop getting regular menstrual bleeding, (20% of Mirena users in 1st year and 60% at 5 years. 12% of Kyleena users) this is a very safe side effect that some women enjoy.