Gov. Sam Brownback has promised to sign legislation to ban a procedure used to terminate hundreds of pregnancies in Kansas every year.

Brownback made his pledge Thursday during a Statehouse rally with hundreds of abortion opponents. The event was sponsored by Kansans for Life and marked the 42nd anniversary of the U.S. Supreme Court decision legalizing abortion across the nation.

The Republican governor has signed several anti-abortion bills since taking office in January 2011.

The latest proposal targets a method in which a doctor uses a forceps, tongs or other medical instruments to dismember a living fetus in the womb. The procedure is used in about 8 percent of abortions in Kansas.

Planned Parenthood issued a statement saying state lawmakers should stop interfering in women’s health care decisions.