A study says Germany's birth rate has slumped to the lowest in the world, prompting fears labour market shortages will damage the economy.
A woman, whose brother was killed in a car accident, has met the man who was given his face in a pioneering transplant operation.
Levels of unconscious racist and sexist bias have been reduced by manipulating the way the brain learns during sleep.
Can Uganda stop the epidemic?
The myth that British teeth are bad
Stories of lives changed through brain injury
Treating the spinally injured
A Canadian province's dire shortage of midwives
The country where the number of people with HIV is soaring
The death of Jeffrey Spector reignites the debate about assisted dying in the UK.