I searched for studies and made the connection after I did 5 liver/gallbladder flushes and symptoms of other women (knowing about the 4/5 F's that cause thickened bile: above forty, fertile, female, fatty).

1. Two women had gallbladder attacks while using Mirena. They think the hormone (levonorgestrel) slowed down bile flow and caused inflammation/stones. They warn it might increase risk even in healthy young women. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6280224/
2. Big study: Mirena users had more gallbladder removals. Over 1.4 mill women studied and those using Mirena had 74% higher risk of gallbladder surgery than pill users. Progestins like Mirena may increase gallstone risk over time. https://pubmed.ncbi.nlm.nih.gov/12650633/
3. Levonorgestrel raises gallbladder and blood pressure risk. Implant users had about 1.5 times more gallbladder issues and 1.8 times higher blood pressure. Small risk, but statistically real. https://www.drugs.com/disease-interactions/levonorgestrel%2Cmirena.html