As marathons go, Amber Miller's time of 6 hours and 25 minutes in the Chicago Marathon is not that impressive. What is noteworthy, however, is that she was 39 weeks pregnant and gave birth to a daughter a few hours after crossing the finish line on Sunday, The Daily Herald reports.

In fact, her official time spent in labor -- 2 hours and 18 minutes -- was less than she spent on the 26.2 mile race.

Daughter June weighed in at 7 pounds 13 ounces, the newspaper says.

The Herald quotes Miller as saying she felt "something" -- contractions -- as she crossed the line, and that they were stronger than normal.

"That's when I figured out what was going on," she tells the suburban Chicago newspaper from her DuPage County hospital room.

Miller says her doctor had given her the clearance to half run and half walk the marathon.