Sex Ratio

Sex ratio is the ratio of males to females in a population. The primary sex ratio is the ratio at the time of conception, secondary sex ratio is the ratio at time of birth, and tertiary sex ratio is the ratio of mature organisms. Typically, as the population increases today the ratio from men to women is uneven; for every 96 men there are 100 women due to the high death rate in males.

The human sex ratio is of particular interest to anthropologists and demographers. In human societies, however, sex ratios at birth may be considerably skewed by factors such as the age of mother at birth, and by sex-selective abortion and infanticide. The CIA estimates that the current world wide sex ratio at birth is 107 boys to 100 girls. In 2010, the global sex ratio was 986 females per 1,000 males and trended to reduce to 984 in 2011.

Read more about Sex Ratio:  Sex Ratio Theory, Fisher's Principle, Types of Sex Ratio

Other articles related to "sex ratio, ratio, sex ratios, sex":

Child Sex Ratio
... In India, the Child Sex Ratio is defined as the number of females per thousand males in the age group 0–6 years in a human population ... Thus it is equal to 1000 x the reciprocal of the sex ratio (ratio of males to females in a population) in the same age group, i.e ... Currently the ratio of males to females is generally significantly greater than 1, i.e ...
Sexism In India - Discrimination Against Women - Selective Abortion and Female Infanticide
... Compared to the normal ratio of births, 950 girls for every 1000 boys, most states of India, especially Harayana, Mumbai and even overseas Indians, have much lower sex ratios ... With increasing misuse and affordability of fetus sex-determining devices, such as ultrasound scan, the rate of female foeticide is rising sharply in India ... India has a low sex ratio, the chief reason being that many women die before reaching adulthood ...
List Of Countries By Sex Ratio - Methodology
... It shows the male to female sex ratio as estimated by United States' CIA ... For example, The World Factbook in 2001 reported Switzerland's sex ratio at birth as 1.05, while Switzerland's Federal Office of Statistics in 2011 reported Switzerland's sex ratio at birth ... A ratio above 1 means there are more males than females, while a ratio below 1 means there are more females than males ...
History Of Huntsville, Alabama - Demographics - Sex Ratio and Income Distribution
... Median Age 37 Sex Ratio FM 10092.8 Sex Ratio age 18+ FM 10089.7 Median Income $41,074 Family Median Income $52,202 Male Median Income $40,003 Female ...
Sex Ratio - Examples in Non-human Species - Economical
... Traditionally, farmers have discovered that the most economically efficient community of animals will have a large number of females and a very small number of males ... A herd of cows with a few prize bulls or a flock of hens with one rooster are the most economical sex ratios for domesticated livestock ...

Famous quotes containing the word ratio:

    Personal rights, universally the same, demand a government framed on the ratio of the census: property demands a government framed on the ratio of owners and of owning.
    Ralph Waldo Emerson (1803–1882)