A growing number of lawsuits filed over the Paragard intrauterine device are products of plaintiffs’ attorney advertising, “not a genuine mass tort,” according Teva Pharmaceuticals USA Inc. and other defendants in the cases.

Teva and affiliated companies are fighting a bid to create multidistrict litigation for more than 55 lawsuits brought over the Paragard IUD, a birth control device that can break apart during surgical removal, leaving pieces in a woman’s uterus. In a Sept. 24 motion to transfer, filed before the U.S. Judicial Panel on Multidistrict Litigation, plaintiffs’ lawyers wrote that it was “likely that hundreds of other actions will be filed.”