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65 entries
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Aging of Population
A process in which the proportions of adults and elderly increase in a population, while the proportions of children and adolescents decrease. This process results in a rise in the median age of the population. Aging occurs when fertility rates decline while life expectancy remains constant or improves at the older ages.
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Birth Control
Practices employed by couples that permit sexual intercourse with reduced likelihood of conception and birth. The term birth control is often used synonymously with such terms as contraception, fertility control, and family planning. But birth control includes abortion to prevent a birth, whereas family planning methods explicitly do not include abortion.
See also:
What are Family Planning and Reproductive Health Programs?
What's in a Word?
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Birth Rate (or crude birth rate)
The number of live births per 1,000 population in a given year. Not to be confused with the growth rate.
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Brain Drain
The emigration of a significant proportion of a country's highly skilled, highly educated professional population, usually to other countries offering better economic and social opportunity (for example, physicians leaving a developing country to practice medicine in a developed country).
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Carrying Capacity
The maximum sustainable size of a resident population in a given ecosystem.
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All terms and definitions, except where noted, are excerpted with permission
from the Population Reference Bureau's International Population Handbook, by
Arthur Haupt and Thomas Kane, 4th Edition, 1998.
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