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If the value is less than one that indicates that the next generation of women will be less numerous than the current one. [ 2 ] The gross reproduction rate is similar to the net reproduction rate (NRR), the average number of daughters a woman would have if she survived her lifetime subject to the age-specific fertility rate and mortality rate ...
According to a 2010–2011 report although the United States was spending more on healthcare than any other country in the world, more than two women died during childbirth every day, making maternal mortality in the United States the highest (12.7 deaths per 100,000 births) when compared to 49 other countries in the developed world. [5]
A study of a population of French women from 1670 and 1789 shows that those who married at age 20–24 had 7.0 children on average and 3.7% remained childless. Women who married at age 25–29 years had a mean of 5.7 children and 5.0% remained childless. Women who married at 30–34 years had a mean of 4.0 children and 8.2% remained childless. [20]
The national fertility rate — calculated as the total number of live births per 1,000 women of reproductive age — has declined steadily in the United States over the past decade, from 62.5 in ...
Replacement fertility is the total fertility rate at which women give birth to enough babies to sustain population levels, assuming that mortality rates remain constant and net migration is zero. [8] If replacement level fertility is sustained over a sufficiently long period, each generation will exactly replace itself. [ 8 ]
Under federal law, the Immigration and Nationality Act of 1965, [41] the number of first-generation immigrants living in the United States has increased, [42] from 9.6 million in 1970 to about 38 million in 2007. [43] Around a million people legally immigrated to the United States per year in the 1990s, up from 250,000 per year in the 1950s. [44]
A female who has never carried a pregnancy beyond 20 weeks is nulliparous and is called a nullipara or para 0. [10] A female who has given birth once is primiparous and is referred to as a primipara or primip. A female who has given birth two, three, or four times is multiparous and is called a multip.
The following list sorts countries and dependent territories by mean age at childbearing.The mean age at childbearing indicates the age of a woman at their childbearing events, if women were subject throughout their lives to the age-specific fertility rates observed in that given year. [1]