手法を比較

	Total Fertility Rate	Mean Age at Childbearing
分野	人口学	人口学
系統	Process / pipeline	Process / pipeline
提唱年	2001	1968
提唱者	Classical demographic index (formalized by Preston, Heuveline & Guillot)	Standard demographic practice (fertility schedule moments)
種類	Period summary fertility index synthesizing age-specific fertility rates	Summary location measure of the age pattern of fertility
原典	Preston, S. H., Heuveline, P., & Guillot, M. (2001). Demography: Measuring and Modeling Population Processes. Blackwell. ISBN: 9781557864512	Preston, S. H., Heuveline, P., & Guillot, M. (2001). Demography: Measuring and Modeling Population Processes. Blackwell. ISBN: 9781557864512
別名	TFR, Period total fertility rate, Sum of age-specific fertility rates, Toplam Doğurganlık Hızı	MAC, Mean age of the fertility schedule, Mean age of mothers at birth, Ortalama Doğurganlık Yaşı
関連	4	4
概要	The total fertility rate (TFR) is the central period measure of fertility in demography: the average number of children a woman would bear over her lifetime if she experienced, at each age, the age-specific fertility rates observed in a given year. Computed by summing age-specific fertility rates across the reproductive ages, the TFR removes the influence of population age structure and gives a single, intuitive figure — children per woman — that is comparable across populations and over time.	The mean age at childbearing is the average age of mothers at the birth of their children, computed as the fertility-rate-weighted mean of maternal age over the age-specific fertility schedule. As the first moment of the fertility curve, it summarizes the tempo — the timing — of childbearing in a single number, complementing the total fertility rate, which measures quantum, or how many children are born.