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en.wikipedia.org/wiki/Sex_ratio

The sex ratio is the ratio of males to females in a population.In most sexually reproducing species, the ratio tends to be 1:1. This tendency is explained by Fisher's principle. For various reasons, however, many species deviate from anything like an even sex ratio, either periodically or permanently.

en.wikipedia.org/wiki/Human_sex_ratio

In anthropology and demography, the human sex ratio is the ratio of males to females in a population.More data is available for humans than for any other species, and the human sex ratio is more studied than that of any other species, but interpreting these statistics can be difficult.

www.searo.who.int/entity/health_situation_trends/data/chi/sex-ratio/en

Population sex ratio (males per 100 females) In the human species the ratio between males and females at birth is slightly biased towards the male sex. The natural “sex ratio at birth” is often considered to be around 105.

www.kff.org/other/state-indicator/distribution-by-gender

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www.cia.gov/library/publications/the-world-factbook/fields/...

note: sex ratio is somewhat skewed by the high proportion of males at the Royal Air Force station, Mount Pleasant Airport (MPA); excluding MPA, the sex ratio of the total population would be 1.04 (2016 est.)

data.worldbank.org/indicator/SP.POP.TOTL.FE.ZS

Population, female (% of total) Close. Browse by Country or Indicator. DataBank Microdata Data Catalog. Menu. ... World Bank staff estimates based on age/sex distributions of United Nations Population Division's World Population Prospects: 2017 Revision. ... Age dependency ratio (% of working-age population) Population, total. Population ...

www.columbia.edu/.../pubhealth/modules/demography/populationRatio.html

Sex ratio: The sex ratio is the ratio of males to females in the population (normalized to 100). We calculate two sex-ratios: At birth, and in the total population. The sex ratio at birth is fairly standard, around 105. Due to higher mortality among males, the sex ratio in the total population switches to 95-97.

statisticstimes.com/demographics/countries-by-sex-ratio.php

The human sex ratio is the number of males for each 100 female in a population. Sex ratio above 100 means there are more males than females. Sex ratio below 100 means there are more females than males.

www.statista.com/statistics/737923/us-population-by-gender

* Based on population projections shown in the Total population of the United States 2023 statistic and a female to male ratio ... from 1994 to 2015, by gender (per 100,000 population ...

www.pewresearch.org/fact-tank/2015/08/14/why-the-former-ussr-has...

The population in Russia and the former USSR as a whole is older than that of the world. Most of these nations, including the most populous, also have low fertility rates compared with the global average. This skews the population’s gender ratio because older people are more likely to be female, while more younger people are male.