Women who have experienced serious complications with their IUDs have filed lawsuits against the manufacturers. Many of the lawsuits have been combined into multidistrict litigation matters. This means that the lawsuits are not class actions, they are handled individually. Most lawsuits are under the products liability law, meaning that manufacturers and sellers of medical devices have a duty to ensure their products are safe for patients. If a manufacturer or seller breaches this duty, they can be held liable for any injuries resulting from the defective medical device.