Population

Emigration is the act of leaving one's resident country with the intent to settle elsewhere.

A logistic function or logistic curve is a common "S" shape (sigmoid curve), with equation: where * e = the natural logarithm base (also known as Euler's number), * x0 = the x-value of the sigmoid's midpoint, * L = the curve's maximum value, and * k = the steepness of the curve.

Infant mortality refers to deaths of young children, typically those less than one year of age.

Family planning, simply put, is the practice of controlling the number of children in a family and the intervals between their births, particularly by means of artificial contraception or voluntary sterilization.

(This article is about scarcity of food. For other uses, see Famine (disambiguation).) A famine is a widespread scarcity of food, caused by several factors including crop failure, population imbalance, or government policies.

The Human Development Index (HDI) is a composite statistic of life expectancy, education, and per capita income indicators, which are used to rank countries into four tiers of human development.

Infanticide (or infant homicide) is the intentional killing of infants or children.

Population geography is a division of human geography.

A population is a summation of all the organisms of the same group or species, which live in a particular geographical area, and have the capability of interbreeding.

A refugee, generally speaking, is a displaced person who has been forced to cross national boundaries and who cannot return home safely (for more detail see legal definition).

World Population day is an annual event, observed on July 11 every year, which seeks to raise awareness of global population issues.

In actuarial science and demography, a life table (also called a mortality table or actuarial table) is a table which shows, for each age, what the probability is that a person of that age will die before his or her next birthday ("probability of death").

International Migrants Day is an international day observed on 18 December as International Migrants Day appointed by the General Assembly of United Nations on 4 December 2000 taking into account the large and increasing number of migrants in the world.

Geographic mobility is the measure of how populations move over time.

The birth rate (technically, births/population rate) is the total number of live births per 1,000 of a population in a year.

Historical demography is the quantitative study of human population in the past.

Mortality rate, or death rate, is a measure of the number of deaths (in general, or due to a specific cause) in a particular population, scaled to the size of that population, per unit of time.

Population decline can refer to the decline in population of any organism, but this article refers to population decline in humans.

Ageing population is a phenomenon that occurs when the median age of a country or region increases due to rising life expectancy and/or declining fertility rates.

A population pyramid, also called an age pyramid or age picture is a graphical illustration that shows the distribution of various age groups in a population (typically that of a country or region of the world), which forms the shape of a pyramid when the population is growing.

The total fertility rate (TFR), sometimes also called the fertility rate, absolute /potential natality, period total fertility rate (PTFR) or total period fertility rate (TPFR) of a population is the average number of children that would be born to a woman over her lifetime if: 1.

Demographic transition (DT) refers to the transition from high birth and death rates to lower birth and death rates as a country or region develops from a pre-industrial to an industrialized economic system.

The demographics of sexual orientation are difficult to establish for a variety of reasons.

Adherents.com says "Sizes shown are approximate estimates, and are here mainly for the purpose of ordering the groups, not providing a definitive number".

In the study of human settlements, an urban agglomeration is an extended city or town area comprising the built-up area of a central place (usually a municipality) and any suburbs linked by continuous urban area.

Gendercide is the systematic killing of members of a specific sex.

Overconsumption is a situation where resource use has outpaced the sustainable capacity of the ecosystem.

Bacterial growth is the asexual reproduction, or cell division, of a bacterium into two daughter cells, in a process called binary fission.

This article delineates the issue of immigration in different countries.

In biology, population growth is the increase in the number of individuals in a population.

In animals, infanticide involves the killing of young offspring by a mature animal of its own species, and is studied in zoology, specifically in the field of ethology.

Sub-replacement fertility is a total fertility rate (TFR) that (if sustained) leads to each new generation being less populous than the older, previous one in a given area.

A two-child policy is a government-imposed limit of two children allowed per family or the payment of government subsidies only to the first two children.

Christian population growth is the population growth of the global Christian community.

The world's energy resources can be divided into fossil fuel, nuclear fuel and renewable resources.

Population transfer or resettlement is the movement of a large group of people from one region to another, often a form of forced migration imposed by state policy or international authority and most frequently on the basis of ethnicity or religion but also due to economic development.

The effects of genocide on youth include psychological and demographic effects that affect the transition into adulthood.

From Population Control to Reproductive Health: Malthusian Arithmetic is a book by Mohan Rao.

In the United States, black genocide is a conspiracy theory which holds that African Americans are the victims of genocide instituted by white Americans.

The term "missing women" indicates a shortfall in the number of women relative to the expected number of women in a region or country.

Early human migrations began with the movement of Homo erectus out of Africa across Eurasia about a million years ago.