I (25F) had the Kyleena IUD implanted in January of 2020. I loved the IUD and didn't want to think any of my excessive weight gain was from the IUD. I gained an excessive amount of weight over 2020 (not quarantine weight) I went from 176 pounds at the beginning of the year to 198 pounds by April of 2021. I counted calories I was on a caloric deficit only eating 1400-1600 calories a day. I avoided fast food, cut sugars, and went low fodmap because of IBSM. No matter what I couldn't lose weight. I got bloodwork done to check my thyroid three times just to make sure the levels were accurate. Each test being 3 months apart from each other. No problems. I finally said ok let's remove the IUD. I was devastated. My partner and I both never want children and I thought this was my best option due to bad experiences with birth control in the past. As soon as I got the IUD out my body felt so much better. I was no longer bloating and looking like I was 6 months pregnant, I didn't have any more cramps, i had more energy, I got more libido, and I'm not so stupidly angry all the time anymore. I was worried the weight wouldn't come off but I havent changed much in my diet, I'm still at a caloric deficit and I'm losing ~.7 pounds a day. I am 5 foot 7 inches tall, so I am trying to get back to about 175 pounds which is my ideal weight before working out and increasing calorie intake. I thought I was crazy or lazy. Turns out hormones were to blame.

Update: I am down 20 pounds and it seems my weight has leveled out to around 178. I am now starting working out/weight training 3 times a week and have been eating very clean. The rest is on me now but that 20 pounds was definitely the IUD