The document discusses population pyramids, which graphically represent age group distributions within a population. It describes three types of pyramids: expansive, stationary, and constrictive, each reflecting different demographic characteristics and societal conditions. Expansive pyramids indicate high birth and death rates typical of developing countries, while constrictive pyramids represent aging populations in advanced countries with low fertility and high life expectancy.

1. POPULATION PYRAMID
Sharon Treesa Antony
Assistant professor
Govt. College of Nursing
Alappuzha

2. POPULATION PYRAMID
 A population pyramid is a graphical illustration that
shows the distribution of various age groups in a
population
 also called age‐sex pyramid

3. THREE GENERAL KINDS OF POPULATION
PYRAMIDS
 1. Stationary
 2. Expansive
 3. Constrictive

4. EXPANSIVE PYRAMID
 A steady upwards narrowing shows that
more people die at each higher age band
 This type of pyramid indicates a
population in which there is a:
 high birth rate
 high death rate
 short life expectancy
 This is the pattern of a economically developing
country

5. STATIONARY PYRAMID
 A population pyramid showing an unchanging
pattern of fertility and mortality
 It indicates slow population growth or stable
population.
 The stationary or near stationary population
pyramid displays somewhat equal share of juvenile
and adult age groups.

6. CONSTRICTIVE PYRAMID
 A population pyramid showing lower numbers
or percentages of younger people
 The country will have a graying population which
means that people are generally older
 It represents low fertility, low mortality, high life
expectancy and ageing of population.
 It is typically associated with very advanced
countries which have a high level of literacy, east
access to birth control measures and very good
health and medical facilities.

7. THANK YOU