Which do you think is better the IUD or the pill?

Joy • Hey my name is Joy. I have had type 1 diabetes since I was 11. I have a chihuahua I love my friends and family to death
I've been thinking about trying the IUD but I'm still not completely sold on the topic I'm just worried that it won't work out. Does anyone have any facts about it? Or any advice on the subject? 

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