Quoting Household 6:" I need help deciding which birth control to get on after this baby. I've pretty much narrowed it down ... [snip!] ... your weight loss? And your overall experiences with them. If you've had both that would be even better if you could compare."
I had a Mirena IUD after Evan and it was a nightmare. I couldn't lose weight to save my life and it made me super depressed. It also had a major effect on my milk supply but luckily I was able to maintain my supply but it was incredibly hard and he weaned at only 15 months. My friend got a Paraguard and claims she literally dried up in a matter of days. Like couldn't hand express a DROP. It was horrendous. She got it removed immediately but had to get donor milk for her six week old and it took two months of hell for her to get her supply back to normal. Hormonal birth control is just not worth the risks IMO, even more so for breastfeeding mothers.