Children born prematurely do worse at school and earn less as adults than those born at full term, a study found.
By their 40s, adults born prematurely were more likely to have below average incomes and work in manual jobs, data showed.
A team led by Professor Dieter Wolke, of the University of Warwick, looked at studies in Britain, Germany and Ireland that tracked children over their lifetimes.
Premature babies - born before 37 weeks - make up 7 per cent of UK births.
The number has risen in recent decades, and infants born as early as 17 weeks can now survive.