I nursed my son for two years with a mirena IUD so it certainly didn't affect my milk supply - haven't heard of any issues with copper IUD but it would certainly be a good idea to ask your doc.
Last pregnancy and this pregnancy my dr only recommended mirena as safe for me. There's some you can't use if breastfeeding and some you can't use if you've had certain complications. Always best to talk to your dr about what options are available to you.
Based off what ii read,, you are able to use any birth control method that only has progestin,, the methods that contain both estrogen && progestin will dry up your milk supply. But its always best to check with your doctor. I knw the shot and implant such as implaimplanon are safe for breastfeed mothers.!!
Yup you will def just have to talk to your doctor about whats best for you and for breastfeeding.
A copper IUD shouldn't. I heard it doesn't affect hormones. Just google your options or talk to you doctor :)