Respuesta :
Even if any country try to reduces its birth rate and try to maintains replacement-level for fertility, its population is still continuous to grow for many decades due to population momentum.
For a given population of people, overall momentum is the dimensions of the hypothetical desk bound populace done with the aid of using projecting modern beginning with alternative fertility, 0 internet migration, and modern steady demise rates, divided with the aid of using the dimensions of the beginning population today. Population momentum happens while a country's fertility charge declines to or beneath alternative stage (youngsters in line with woman), but the population length maintains to develop because of the age shape of the population.
At instances while an growing percentage of girls input the reproductive age bracket the population can maintain developing although the fertility charge is falling. This is what demographers talk over with as 'populace momentum' and it explains why the range of youngsters withinside the global will now no longer decline as unexpectedly because the fertility charge. However, even after accomplishing the alternative stage of fertility, the population will keep growing for 3 to 4 a long time as a result of the population momentum (massive cohorts of girls of their reproductive age groups). Post-Independence, withinside the 1950s, India had a TFR of six.
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