A woman's biological clock runs faster than a man's, according to a new report released this week. Research by Harvard-affiliated Brigham and Women's Hospital found that the internal clock that determines when people naturally sleep runs about six minutes faster in women. It was revealed that 157 people spent around eight weeks in a windowless lab to discover more about their sleep rhythms. The study confirmed that the slightly faster pace of getting to sleep could be the cause of more women suffering from insomnia. Additionally, it was noted that over one in three women have a daily cycle of less than 24 hours, meaning that a lot of them will generally wake up earlier. Charles Czeisler, a professor of sleep medicine at Harvard Medical School, told NPR that many women do not believe their early waking tendencies are a problem, he said: "Before the rest of the world wakes up, they can get an extraordinary amount done - and they wouldn't trade it for the world."