"i am 23 with no children. i just had mirena inserted 2 days ago. the insertion was not so bad. it felt like 2 really bad, but quick cramps. the first cramp was for the measurement of the uterus, the second was for insertion. i was prescribed a medicine for stomach ulcers that softened the uterus when entered into the vagina. my period was about to come on also during the visit. my doctor said that helps. i&#039;m here to say it&#039;s not too bad. worry free birth control. it does have risks like all others. when you think about it, its a lot safer than pregnancy. the cramps after insertion agent too pleasant, nothing that pain killers can&#039;t help. i hope this helps."