1. The Demographic Transition Model *hereafter referred to as the DTM

3. STAGE ONE Population Pyramid Shape Wide bottom, wide top Example
None in existence
Birth Rate
High
Death Rate
Natural Increase
Slow

4. STAGE ONE Reasons for change in birth rate Children needed to farm
High Infant Mortality Rate
Religious/Social Encouragement
Little Family Planning

5. STAGE ONE Reasons for change in death rate Disease Famine
Little medical access

6. STAGE TWO Population Pyramid Shape Wide base, narrow top Example
3rd World
Birth Rate
High
Death Rate
Rapid Decrease
Natural Increase
Rapid Increase

7. STAGE TWO Reasons for change in birth rate Children needed to farm
High Infant Mortality Rate
Religious/Social Encouragement
Little Family Planning

8. STAGE TWO Reasons for change in death rate Improved medical care
Safe/constant water supply
Improved sanitation
Fewer children die

9. STAGE THREE Population Pyramid Shape Equilateral triangle Example
Brazil, Mexico, India
Birth Rate
Slowly Falling
Death Rate
Levels Off
Natural Increase
Slower Increase

10. STAGE THREE Reasons for change in birth rate Improved medical care
Improved diet
Less children needed to work
Improved economy

11. STAGE THREE Reasons for change in death rate Improved medical care
Safe/constant water supply
Improved sanitation
Fewer children die

12. STAGE FOUR Population Pyramid Shape coffin Example
USA, Western Europe, Japan
Birth Rate
Low
Death Rate
Natural Increase
Stable,Slow

13. STAGE FOUR Reasons for change in birth rate Family Planning
Improved Women’s Status
Late Marriage

14. STAGE FOUR Reasons for change in death rate Excellent Health Care
Excellent Food Supply

15. STAGE FIVE
Population Shrinks
Postindustrialized