There are hopes new technology will help more premature babies survive.
A Dutch university has been granted about $5 million for attempts to create an artificial womb.
In 2017, an American researcher demonstrated an artificial womb kept lambs alive from the equivalent of 23 weeks' gestation.
Fordham University bioethicist Elizabeth Yuko told Kate Hawkesby it could be a breakthrough for premature care.
She says trying to mimic the condition of a womb is a step in the right direction.
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