What causes uterine fibroids? The causes of fibroids are not known. Most fibroids occur in women of reproductive age, and according to some estimates, they are diagnosed in black women 2-3 times more frequently than in white women. They seldom are seen in young women who have not begun to menstruate. The symptoms of uterine fibroids usually stabilize or go away in women after menopause.
trees of unknown age; His age is 20 years. 2. a period of human life, measured by years from birth, usually marked by a certain stage or degree of mental or physical development and involving legal responsibility and capacity: the age of discretion; the age of consent; The state raised the drinking age from 18 to 21 years.
Focusing on a populationâs age and sex composition is one of the most basic ways to understand population change over time. In general, the U.S. population continues to grow older with a median age over 40 years old in many states.ensus Bureau programs define age as the length of time in completed years that a person has lived. For the most recent decennial census, age was the length of time in completed years that a person had lived as of Census Day--April 1, 2010. The Census Bureauâs national surveys compute age as of the interview date.