Utah County Attorney Jeff Buhman told the judge that prosecutors also will write a letter to the Utah Board of Pardons and Parole about Huntsman's cooperation in the investigation after the children's bodies were discovered in her garage 10 months ago.
"We'd be surprised if she ever gets out of prison," despite concessions on the part of the prosecution, Buhman said. "There are probably very few people at the Utah State Prison that are responsible for six murders."
The bizarre case has received both national and international media attention.
Huntsman is accused of killing the six infants shortly after birth during the period from Jan. 1, 1996, to Dec. 31, 2006.
"The defendant gave birth to six children," Buhman told the judge. "Those children were born alive. Immediately after each child's birth, she either choked or smothered the child to death."
Neither Huntsman's defense attorneys nor members of her family commented to the media after the hearing.
Buhman said prosecutors have kept in contact with a family spokesperson, and that her family supported Thursday's resolution.
Huntsman's long-kept secret began to unravel in early April, when her now-estranged husband, 41-year-old Darren West — who had spent eight years in prison for drug crimes before being released into a Salt Lake City halfway house — was retrieving some of his belongings at their Pleasant Grove home.
Inside the garage, West found the remains of a baby wrapped in plastic bags and a green towel and stuffed into a white box, sealed with electrical tape. Alerted to the grisly discovery, police later found six more infant corpses similarly stored inside other boxes.
Huntsman allegedly told investigators that she had killed six of the infants, while a seventh child was stillborn.
West and Huntsman have three living children together, all daughters, now ages 13 to 20.
Police have said that Huntsman used methamphetamine heavily and that her drug addiction was a motive for her crimes.