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The
The human sex ratio
In anthropology and demography, the human sex ratio is the ratio of males to females in a population. Like most sexual species, the sex ratio in humans is close to 1:1. In humans, the natural ratio at birth between males and females is slightl ...
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.
Methodology
The table's data is from ''The World Factbook
''The World Factbook'', also known as the ''CIA World Factbook'', is a reference resource produced by the Central Intelligence Agency (CIA) with almanac-style information about the countries of the world. The official print version is available ...
'' unless noted otherwise. It shows the male to female sex ratio by the Central Intelligence Agency
The Central Intelligence Agency (CIA ), known informally as the Agency and historically as the Company, is a civilian foreign intelligence service of the federal government of the United States, officially tasked with gathering, processing, ...
of the United States. If there is a discrepancy between ''The World Factbook'' and a country's census data, the latter may be used instead.
A ratio above 1, for example 1.1, means there are more males than females (1.1 males for every female). A ratio below 1, for example 0.8, means there are more females than males (0.8 males for every female). A ratio of 1 means there are equal numbers of males and females.
Countries
See also
*List of Chinese administrative divisions by sex ratio
The sex ratio of the different administrative divisions of China has been the subject of academic study because of a high imbalance in births since the 1990s and female infanticide further worsening the imbalanced sex ratios at birth.
Gender r ...
* List of states and union territories of India by sex ratio
Sex ratio is used to describe the ratio of females to males in a population. In India, the sex ratio has been estimated via a number of methods and data sets including the decennial censuses, the National Family Health Surveys (NFHS), the Civi ...
* Missing women
The term "missing women" indicates a shortfall in the number of women relative to the expected number of women in a region or country. It is most often measured through male-to-female sex ratios, and is theorized to be caused by sex-selective abort ...
References
{{DEFAULTSORT:Countries by sex ratio Demographic listsSex ratio
The sex ratio (or gender ratio) is usually defined as the ratio of males to females in a population. As explained by Fisher's principle, for evolutionary reasons this is typically about 1:1 in species which reproduce sexually. Many species devia ...
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