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The 2011 birth sex ratios for China and India are significantly above the mean ratio recorded in the United States from 1940 through 2002 (1.051); however, their birth sex ratios are within the 0.98–1.14 range observed in the United States for major ethnic groups over the same time period.
Sex ratio by country for total population. Blue represents more males than the world average of 1.07 males/females. (2020) The human sex ratio is the comparative number of males with respect to each female in a population. This is a list of sex ratios by country or region.
The tertiary sex ratio is equivalent to the adult sex ratio (ASR), which is defined as the ratio of adult males to females in a population. [ 6 ] [ 7 ] The operational sex ratio (OSR) is the ratio of sexually active males to females in a population, and is therefore derived from a subset of the individuals included when calculating the ASR. [ 7 ]
Sex-selective abortive procedures result in excess of male births, which then significantly skew sex ratios within a population. [32] According to China Statistics Press 2013, China's sex ratio at birth was 111 in 1990, 117 in 2001, 121 in 2005 and 119 in 2010. [33] Approximately 37-45% of China's missing women may have gone missing prior to ...
Gender parity is a statistical measure used to describe ratios between men and women, or boys and girls, in a given population. Gender parity may refer to the proportionate representation of men and women in a given group, also referred to as sex ratio , or it may mean the ratio between any quantifiable indicator among men against the same ...
Falling birth rates have put major global economies on the path toward "population collapse," according to a report from ... the study noted that the world's support ratio was 9.4 in 1997, or more ...
The U.S. birth rate has been steadily declining for years, but fairly recently it has tipped over into an alarming category. The estimated “replacement fertility rate,” or the number of births ...
The other aberration from this otherwise-steady decline in teen birth rates is the six percent decrease in birth rates for 15- to 19-year-olds between 2008 and 2009. [65] Despite the decrease, U.S. teen birth rates remain higher than those in other developed nations. [ 65 ]