It could take weeks to get the results, Utah County Attorney Jeff Buhman said.
Investigators believe West and Huntsman were together when the babies were born, but don't believe he was aware of the killings. Buhman said Huntsman is the principle suspect, but didn't rule out more arrests as the investigation continues.
Police declined to discuss whether West or the three daughters have been interviewed.
West pleaded guilty in federal court in 2005 to two counts of possessing chemicals intended to be used in manufacturing methamphetamine, according to court records. In August 2006, he was sentenced to 9 years in prison, but appealed three times.
As he maintained his innocence, Huntsman wrote a letter asking a federal judge to consider leniency at sentencing.
"Darren is a remarkable man, husband, brother, son, son-in-law, friend and father of our three beautiful daughters," she wrote, continuing, "Please we need this guy to keep our family together."
Neighbor Sharon Chipman said the couple married young, and Huntsman never worked except for a short stint at a grocery store.
The three daughters who were living in the house were good young women who have turned out remarkably well considering their father has been in prison, Chipman and Wall said.
West's parents have played an influential role in their upbringing, especially the youngest, who is still in junior high.
Wall said she's puzzled about why Huntsman would have killed the babies, especially considering her youngest daughter, now a young teen, was born during the decade Huntsman told authorities she killed the other babies.
"Why was one of them saved?" Wall said.
Like all states, Utah has a safe haven law that allows women to drop off unwanted newborns to authorities with no questions asked. The mother can remain anonymous as long as the child has not been subject to abuse or neglect.