Levonorgestrel
"I got my IUD placed 8 weeks after having my first baby. The insertion was a little uncomfortable but quick and bearable. I had cramping the first day and some spotting. So far, I've had my first period which was very light and lasted 4 days. I've had my IUD for a month.  I feel great. It's nice not having to worry about a pill every day especially while caring for an infant. I will rate later on after I've had it longer also."