The Baby Train is a popular urban legend, told in the United States, United Kingdom and Australia. According to the rumor, a certain small town had an unusually high birth rate. It seems that a freight train would pass through the town at 5:00 am and blow its whistle, waking up all the residents. Since it was too late to go back to sleep and too early to get up, couples would find other ways to amuse themselves in bed. This resulted in the mini-baby boom.