(AP) — Two Kansas doctors challenging a sweeping new state abortion law are attacking its form as well as its substance.

Dr. Herbert Hodes and daughter Dr. Traci Nauser perform abortions at their health center in Overland Park and filed a lawsuit against the new law in Shawnee County District Court.

They’re asking a judge to strike down the entire law before their lawsuit goes to trial in Shawnee County. In a filing late last month, they argued that the bill approved by legislators violates the state constitution’s rule that bills contain only one subject.

The doctors contend the law’s provisions are so far ranging that they represent multiple subjects. But Kansans for Life executive director Mary Kay Culp called their attack “a desperate move.”