The mortality of the population.. The decline in deaths due to medical advances led to the phenomenon of population explosion

- Components of population change: fertility, mortality, migration

- Mortality is an important element of the components of population change where excellence in impact factor of migration, albeit in fertility preceded it.

- Deaths firmer element of fertility and can control the level.

- The decline in deaths due to medical advances of the main factors that led to the phenomenon of population explosion, which is the most important features of modern human history, especially in developing countries.

v death registration began in the 17th century at the hands of John Gront.

v mortality studies based on gender and age a life table.