Fertility rate: Shrinking population in six easy lessons
Research suggests most countries' populations will have shrunk by the end of the century.
Author Archives: BBC News - Health
Seven countries with big (and small) population problems
A look at seven countries facing dramatic population changes - and how they are tackling the problem.
Child vaccinations fall sharply amid pandemic, UN says
The decline in immunisations against some diseases is the first in nearly 30 years, the UN says.