On Friday, "Vote Yes For Life", the group supporting a proposed abortion ban in South Dakota, made their case as to why a television ad aimed at defeating Initiated Measure 11 is, in their words, "deceptive." The controversy centers around how Initiated Measure 11 would impact a woman's right to choose if she had a condition known as Twin to Twin Transfusion Syndrome.

The ad in question was created by The South Dakota Campaign For Healthy Families, which opposes Initiated Measure 11. It features the story of, Tiffany Campbell, who learned she had Twin to Twin Transfusion Syndrome in 2006. In the ad Tiffany says she was faced with the decision of ending the life of one twin to save the other.

The procedure Tiffany Campbell underwent is called "selective termination." The South Dakota Campaign for Healthy Families says that option will be off the table if the Initiated Measure 11 passes, but, on Friday, doctors with "Vote Yes For Life" argued that it would still be an option if the mother's health is in question.

Friday's press conference at "Vote Yes For Life" wasn't the only place doctors were discussing Twin to Twin Transfusion Syndrome, it was also the topic of a medical presentation called the "Grand Rounds" held at Sanford hospital.

The featured speaker was Dr. Michael Bebbington, a surgeon specializing in fetal and maternal medicine with The Children's Hospital of Philadelphia. Dr. Bebbington is not affiliated with either side of the abortion debate. He specializes in a laser procedure for Twin to Twin Transfusion Syndrome, which attempts to save the lives of both twins, meaning it would not violate Initiated Measure 11. The laser is used to separate the blood vessels between connected twins, but Dr. Bebbington says it's not always a possible option for mothers facing Twin to Twin Transfusion Syndrome.

"We know in some situations there's nothing we can do to save one of the fetuses," Dr. Bebbington said.

Dr. Bebbington says that's when "selective termination" is an option. The procedure ends the life of one twin in order to save the other.

When Tiffany Campbell sat down with KSFY on September 24th, she said she opposes Initiated Measure 11 for other parents facing "selective termination."

"If this passes then they won't have the same option that we did to save a life," Campbell said. "They will not be able to intervene and save one of their babies."

On Friday, Dr. Glenn Ridder, a family practice doctor affiliated with "Vote Yes For Life," suggested that "selective termination" might not actually be banned by Initiated Measure 11.

"This situation may actually cause significant problems to the mother," Dr. Ridder said. "Which would then of course be covered by Initiative 11."

Dr. Peter Van Eerden, who specializes in maternal and fetal medicine at Sanford, is also not affiliated with either side of the debate. He says "selective termination" is a last resort, and says the health of the mother isn't necessarily the deciding factor.

"I think in the immediate period when you're doing these procedures or offering these procedures to patients. It's not to prevent complications to the mother," Dr. Van Eerden said. "I think certainly they may develop, as they may develop with any pregnancy."

Dr. Bebbington put it more simply.

"The intent is to save the co-twin," he said.

"Vote Yes For Life" also called the advertisement "deceptive" because neither selective termination nor the laser procedure used for Twin to Twin Transfusion Syndrome are currently performed in South Dakota.

The South Dakota Campaign for Healthy Families responded by stating that Initiated Measure 11 might keep those procedures from ever coming to the state. They also said that, if passed, the ban would be legally challenged on a national level.