Mirena
"I am 38 years old with two kids ages 9 and 11.  I had my Mirena placed one week ago and so far have had no side effects at all.  I had been taking Seasonale birth control pills without a break after the third month and not having a period for the past 4 years.  I am in the military and deploying without having to worry about taking along 6 months worth of birth control and menstruation products is a HUGE relief.  I had some cramping after the insertion but took two OTC pain relievers and haven't felt anything since.  I've run miles with it in, I've done push-ups and sit-ups and not felt a thing.  For me this has been a completely great experience and my husband hasn't noticed any difference when we have intercourse."