In nature, most species that reproduce sexually tend to have a sex ratio of 1:1. That means an equal number of males and females in the population. This is applicable to humans as well. However, due to external factors, the sex ratio in case of humans is not always 1:1. For example, things like female infanticide can tilt the balance against females. The theory of 1:1 sex ratio is governed by Fisher’s Principle, which explains how nature is able to maintain the balance between males and females.
If we analyze global demographic data, we can see that the countries can be broadly classified into three categories in terms of sex ratio. There are countries that have more females than males, same number of males and females and more males than females. Here’s a look at some countries that have the highest female population by birth in 2020.
Nauru – This island country located in the Central Pacific has the highest female population in percentage terms. The sex ratio at birth is 0.84 and overall sex ratio is 0.88. Nauru is as remote a country can be and it is spread across an area of just 21 km. sq. This makes it the third smallest country in the world, next to Monaco and Vatican City. As per estimates, the country’s population is more than 11,000.
Kazakhstan – Located in Central Asia, Kazakhstan has a population of around 19 million. Its sex ratio at birth is 0.94 and overall sex ratio is 0.91. The country is spread across an area of 2,724,900 km2, making it the eighth largest in the world by size. It is also the largest landlocked country in the world. Kazakhstan shares its borders with China, Russia, Turkmenistan, Uzbekistan, and Kyrgyzstan.
Barbados – An island country located in the Caribbean, Barbados has a population of around 300,000. Sex ratio at birth is 1.01 whereas overall sex ratio is 0.94. Barbados has a long history and earlier, it was ruled by Spanish as well as British. The country gained its independence in 1966. It primarily relies on tourism and manufacturing.
Haiti – Located on the Greater Antilles archipelago of the Caribbean Sea, Haiti has an estimated population of 11.4 million. The country occupies an area of 27,750 square kilometers. Sex ratio by birth is 1.01 whereas overall sex ratio is 0.98. The country was earlier part of Spain and France.
Aruba – An island country and part of the Kingdom of the Netherlands, Aruba is located mid-south of the Caribbean Sea. Land area is 179 km2 and population is estimated to be around 116,600. Aruba sex ratio by birth is 1.02 whereas overall sex ratio is 0.90. Tourism is one of the primary economic activities in Aruba.