Indiana Couple Welcomes 'One in a Million' Set of Triplets

A naturally conceived set of triplets can be as rare as "one in a million."

Ashley and Matt Alexander of Greenfield, Indiana, were surprised weeks ago when they learned they were expecting three new additions to their family during a routine sonogram, according to ABC affiliate WRTV-TV in Indianapolis, Indiana.

"She was checking [Ashley] and right away there were twins, and she goes, 'Let me check for a third,'" Matt Alexander told WRTV-TV in an earlier interview. "I'm like, she's just joking. I said, 'You're joking,' and she said, 'No, we don't joke about this stuff.' So [Ashley] about came off the table."

The couple, who already have a son, had conceived the triplets naturally, so they were not expecting to see three heartbeats on the sonogram.

Ashley Alexander told WRTV-TV she has a plan to tell the girls apart.

"I'm painting their nails," she said. "One's going to be pink, one purple, and the other probably pale blue."

"It's hard to calculate a conservative estimate," Gilbert said about the rate of naturally conceived identical triplets. "One in 70,000 - that would be on the low end. The high end is one in a million."