WICHITA, Kan. (AP) — An abortion rights group is challenging Kansas’ first-in-the-nation ban on a commonly used procedure to end second-trimester pregnancies.

The lawsuit filed Monday in Shawnee County District Court by the Center for Reproductive Rights asks the court to declare the law unconstitutional. It also seeks to block implantation of the law, which is to take effect in July. The lawsuit was filed on behalf of doctors Herbert Hodes and Traci Nauser of the Center for Women’s Health in Overland Park.

A spokeswoman for Kansas Attorney General Derek Schmidt said his office would issue a statement later.

Anti-abortion activists describe the method as dismembering a fetus.

The lawsuit contends it is the most commonly used procedure to end a pregnancy after 14 weeks, and is used in 95 percent of abortions nationwide.