Unborn babies "practise" facial expressions of pain while they are in the womb, scientists from Durham University say.
Foetuses have been pictured using 4D scanning technology showing what appears to be pain.
Researchers suggest the ability to grimace is a "developmental process" which could help doctors asess the health of the foetus.
The study, published in the journal "Plos One", found when the mother was 24 weeks pregnant, unborn babies were able to make simple expressions such as smiling.
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Gales for hills overnight. Blustery Sunday with colder air digging in. Sunshine & scattered showers, showers turning wintry into Monday.
On a tour of the North East today, the Chancellor George Osborne made a series of promises which he claimed would help create 50,000 jobs.
Hundreds of people are expected to take part in two separate demonstrations in Newcastle tomorrow.