The stages of the life cycle, Ageing

The age of puberty in boys

Boys reach puberty at around 15 years—later than girls, who usually begin menstruating around age 13.

Joëlle Gaymu

tells us about INED’s new Old age and Ageing research group [Pôle Vieillesses et Vieillissements]

China, a demographic giant with feet of clay

China, the world’s largest country in terms of population, is now a predominant player on the international economic and geopolitical stage.

The World Population and me

Where do you stand in the world population? Enter your age and you will find out: The world population in the year you were born ? How many people were born the same year as you ? How many are still alive ? How many are dead ? How many are older than you ? How many are younger than you ? Generation’s evolution proposed by l’institut national d’études démographiques.

Population by age

Population Pyramid

All countries