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Growth of U.S. Population, Growth through Natural Increase: Births

natural increase, American population, population growth, American women, fertility

While the influx of immigrants contributed to the growth of the American population and helped build American society, the major factor affecting population growth in the United States has always been the surplus of births over deaths, or the natural increase of the population. American women at the beginning of the 21st century bear an average of two children over the course of their lives. Their great-grandmothers and great-great-grandmothers in 1890 had an average of four children, because in the 19th century fewer women had access to reliable methods for controlling fertility. A century earlier, around 1790, women might expect seven births throughout their lives, if they survived into their late 40s.

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natural increase, American population, population growth, American women, fertility, American society, deaths, major factor, lives, average, beginning, United States, children, course, access

 
 

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