"i&#039;m 31 years old with a 2-month old. had mirena inserted last week--no pain at all. i think they suggest it for women who have previously had children because insertion can be very painful if you haven&#039;t. but mine was quick and easy, no side effects, although i did start bleeding last night. after reading some of the reviews here, i&#039;m hoping it doesn&#039;t last very long!"