Abortion advocates say they don’t like Utah’s new fetal anesthetic law, but they also won’t try to stop its implementation.

According to The Associated Press, the law that took effect on Tuesday requires all abortionists in the state to administer painkillers or anesthetics to babies aborted at 20 weeks’ gestation or later. It is the first of its kind in the nation, and it has abortion advocates up in arms — even as the state’s top Planned Parenthood official said she won’t sue to stop the law.

“It’s a bogus law,” said Planned Parenthood Association of Utah CEO Karrie Galloway. “I’m sorry about it, but I can’t take on every silly thing that people do.”

Like many other abortion supporters, Galloway takes issue with the idea that unborn children feel pain at 20 weeks’ gestation. One doctor told AP that “the pain doesn’t exist, so I can’t make it go away.”

Pro-life advocates, however, point to standard medical practices and the science of unborn pain to back the Utah law.

As reported by The Washington Post last year, “Anesthesia is already part of standard medical procedure” for many surgical fixes that take place inside the womb for “birth defects and life-threatening conditions.”

“In terms of fetal surgery that’s just what we do,” said Elaina Lin, an assistant professor of medicine at the University of Pennsylvania, told the Post. According to Lin, however, her study of the issue shows that “by the late second or early third trimester, what most clinicians can agree on is that the pathways are there for them to feel some sort of stimulation,” not pain.

Other studies differ from Lin’s conclusion, and pro-life advocates say the scientifically-studied responses to stress and other stimuli provide a foundation for the anesthetic precaution. Pro-life leaders also say the science of pain in utero is part of why they have pushed a popular bill through a dozen states and the U.S. House that would ban most abortions after 20 weeks’ gestation.

The President of Pro-Life Utah, Mary Taylor, told AP that she would have preferred Utah prioritize the late-term abortion ban, but at the same time, she supports the fetal anaesthesia law. “We do believe it has opened up a discussion and maybe promoted some awareness into the subject of fetal pain,” Taylor said. “That would be the biggest benefit.”