Write the reasons for the radiation of girls population and boys
Answers
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 approximately 1:1. Due to higher female fetal mortality, the sex ratio at birth worldwide is commonly thought to be 107 boys to 100 girls, although this value is subject to debate in the scientific community, and since the late 1980s sex selective abortions of females have caused a higher than natural proportion of male births globally, mostly due to son preference in East Asia and South Asia. Girl births become more frequent closer to the Equator in absence of sex selection; the Central African Republic even has a female surplus, with 51 percent of children born there girls.
The sex ratio for the entire world population is 102 males to 100 females (2017 est.).[5] Depending upon which definition is used, between 0.1% and 1.7% of live births are intersex.
Gender imbalance may arise as a consequence of various factors including natural factors, exposure to pesticides and environmental contaminants, war casualties, sex-selective abortions, infanticides, aging, and deliberate gendercide.
Human sex ratios, either at birth or in the population as a whole, are reported in any of four ways: the ratio of males to females, the ratio of females to males, the proportion of males, or the proportion of females. If there are 108,000 males and 100,000 females the ratio of males to females is 1.080 and the proportion of males is 51.9%. Scientific literature often uses the proportion of males. This article uses the ratio of males to females, unless specified otherwise.