Compare methods

	Population Pyramid Analysis	Total Fertility Rate
Field	Demography	Demography
Family	Process / pipeline	Process / pipeline
Year of origin	1874	2001
Originator	Francis A. Walker (early age-sex diagrams); standard demographic practice	Classical demographic index (formalized by Preston, Heuveline & Guillot)
Type	Graphical and tabular analysis of population age-sex structure	Period summary fertility index synthesizing age-specific fertility rates
Seminal source	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
Aliases	Age-sex pyramid, Population age structure diagram, Age structure analysis, Nüfus Piramidi Analizi	TFR, Period total fertility rate, Sum of age-specific fertility rates, Toplam Doğurganlık Hızı
Related	4	4
Summary	Population pyramid analysis is the description and interpretation of a population's age-sex structure through a back-to-back horizontal bar chart, with males on one side, females on the other, and age groups stacked from youngest at the bottom to oldest at the top. The shape of the pyramid encodes a population's fertility, mortality, and migration history and is the demographer's first diagnostic of whether a population is young and growing, ageing, or contracting.	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.