when a woman who is 39 weeks pregnant does it, that is a whole another story. i can t believe this story. that was not even the highlight of her day. hours after she finished the chicago marathon she gave birth. wls reports. reporter: they started coming regularly the that s when i thought, well, maybe this is labor. reporter: amber miller said she felt a little something when she crossed the finish line at the sunday chicago marathon. the twinge one of the first signs her baby was on the way. the race was definitely easier than the labor. under the watchful eye of her husband, the nearly 39 week veteran marathoner, set an easy pace. running half. walking half the race. all the while not sure she was having contractions. she was doubtful she would complete the course. she finished the 26.2 mile race around 3:00 p.m. in 6:25. three more hours than her more than three hours better than her personal best. she didn t have the big goal