Births per 1000 women, categorized according to a specific composition of mothers in the population: (1) Crude birth rate: number of live births per 1000 of population. (2) General fertility rate: number of live births per 1000 women between the ages of 15 and 44 years. (3) Age-specific fertility rate: number of births to women of a particular age (called cohorts). (4) Total fertility rate: Average number of children a woman would bear during her lifetime, assuming her childbearing conforms to her age-specific fertility rate every year of her childbearing years (typically, age 15 to 44). (5) Completed fertility rate: number of children actually born per woman in a cohort of women up to the end of their childbearing years (typically, age 44).