Birth sex ratio

Thank you for visiting nature. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser or turn off compatibility mode in Internet Explorer. In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript. However, despite decades of research, empirical results from across the social and biological sciences are equivocal on this topic.
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21.10.2020
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Human sex ratio

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Gender Ratio - Our World in Data

Across the world there are differences in the sex ratio at different life stages. This imbalance in the male and female population can in some cases be traced back to birth: in some countries the number of boys and girls born each year is significantly skewed. In the map we see the differences in sex ratio at birth across the world. Here the sex ratio is measured as the number of male births for every female births; a value greater than indicates there are more boys than girls born that year. A figure of would indicate that there are male births for every female births. The first striking point is that in every single country of the world there are more boys born than girls. This has been true for all years for which we have data as far back as in all countries of the world, as you can when you move the timeslider below the map further back.
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How does the sex ratio at birth vary across the world?

In anthropology and demography , the human sex ratio is the ratio of males to females in a population. More data are 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. Like most sexual species, the sex ratio in humans is close to
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The ratio between the number of males and females in a society is referred to as the gender ratio. This ratio is not stable but instead shaped by biological, social, technological, cultural, and economic forces. And in turn the gender ratio itself has an impact on society, demography, and the economy. In this entry we provide an overview of the variation and the changes of the gender ratio across the world.
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