Transformed by a beaming smile, this is the tiny face of a fetus just 17 weeks old. The scan implies that a baby can experience feelings such as happiness and pain much earlier in its development than previously thought. It will prompt further calls from doctors and campaigners to lower the upper abortion limit from 24 weeks. They claim that by his stage the unborn baby can already feel agonising pain and the procedure is therefore inhumane. Many experts dispute these claims, however, and say that a foetus is naturally sedated and unconscious in the womb and cannot experience any senses. Professor Stuart Campbell, who took the picture at his London clinic with 3-D and 4-D scanning equipment, said it did not necessarily show the unborn child had feelings – but it was certainly displaying human behavior.