Amber Miller, of Westchester, Ill., holds her baby at Central DuPage Hospital in Winfield, Ill., Monday Oct. 10, 2011. Miller felt contractions a few minutes after finishing the Chicago Marathon on Sunday and gave birth hours later to a baby daughter. (AP Photo/Daily Herald, Mark Black) MANDATORY CREDIT

CHICAGO (AP) — Amber Miller says she felt contractions minutes after crossing the Chicago Marathon finish line.

A few hours after completing the 26.2-mile race Sunday, the suburban Chicago woman gave birth to her daughter, June.

The 27-year-old is an experienced marathoner who found out she was pregnant after signing up for the race months ago. She figured she'd play it by ear on whether or not she'd run.

Miller was nearly 39 weeks pregnant by Sunday. She got clearance from her doctor to half run and half walk the race.

She finished in 6 hours and 25 minutes, much slower than her previous seven marathons.

Miller spoke to The Associated Press from the hospital and says she received encouraging cheers during the race and never felt bad, except for some feet blisters.