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the process by which a country moves from relatively high birth and death rates to relatively low birth and death rates
the third stage of the demographic transition model, characterized by falling birth rates that close the gap with falling death rates and reduce the rate of population growth
the average age that a newborn infant can expect to attain in a particular time and place
the fourth and final stage of the demographic transition model, in which both birth and death rates have fallen to a low level and remain stable there, and populations may even decline slightly
the first stage of the demographic transition model, characterized by conditions that defined most of human history; high birth and death rates
the number of children a couple must have to replace themselves (2.1 developed, 2.7 developing)
total fertility rate (TFR)
the average number of children a woman will have throughout her childbearing years
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