The Prime Minister asked schoolchildren in Liberia what they wanted to be when they grow up. They said doctors and lawyers, to which David Cameron joked that children in the UK want to be popstars.
More top news
Facebook, Twitter and Google "are not simply platforms for the content that others post" because they play a role in shaping what users see.
The condition was revealed by a nine-week scan, which showed the baby's heart and part of her stomach growing outside the body.
The scan of the object will begin on Wednesday, with astronomers using four different radio frequency bands. It will last around 10 hours.