A study comparing premature babies born 11 years apart has shown more newborns than ever are surviving.
Major medical advances have helped babies born between 24 and 26 weeks. But the rates of severe health complications have not improved at all.
ITV News's Medical Editor Lawrence McGinty reports:
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The Duke of Cambridge said his children were beginning a "lifetime of friendship" with Canada as they began their tour of the country.
When and where are they on, and how do they work?
What better, more dramatic spectacle has there ever been on American television?