Ultrasound images which show 12-week-old foetuses sucking their thumbs and walking in the womb are dangerously misleading, a group of scientists warned today. The 3D images of unborn babies apparently behaving in a similar way to newborns raised questions over whether the upper limit for abortions should be reduced form 24 weeks. However, a group of scientists has now warned the scans could be dangerously misleading as they do not reflect the true nature of an unborn baby's brain. Dr Donald Peebles, a consultant in foetal medicine at University College London, said the temptation to associate foetal movements with adult...