Factors Influencing Population Growth.
Answer Text: Factors Influencing Population Growth.- Population growth is the change that occurs in the number of people in a population over a given period of time.- Population may grow positively by number of people increasing in a population or negatively by having a decrease in the number of people.- The main factors influencing population growth are fertility, mortality and migration.(a) Fertility- Terms used in fertility include:- Fertility - Number of live births a woman has during her reproductive period.- Fecundity - Ability of a woman to conceive and give birth to a child regardless whether alive or still born.- Infecundity/ Sterility - Inability of a woman to conceive and give birth to a child regardless whether alive or still born.- Primary Infertility - Involuntary childlessness.- Involuntary Secondary Infertility - Involuntary childlessness caused by a second factor e.g. when a woman has had a child/children and is unable to have more due to health factors.- Voluntary Secondary Infertility - Voluntary childlessness where a woman who has had a child/children decides not to have any more e.g. by using contraception methods.- Fertility Rate - Average number of children that a woman of child bearing age (15-49 years) will have in her lifetime.-High fertility rate leads to high population growth while low fertility rates lead to slow or negative population growth.- Population Growth- Increase or decrease in the number of people.
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