Am 27 weeks pregnant and have just been for a growth scan as the legs have been short throughout. Our last scan in July showed his legs were about a week behind but today's scan results state that the arm bones are also small and it could be a sign of dwarfism. The consultant has ordered another scan on monday and says the scanner may have made a mistake however i am now a nervous wreck and can't understand why the arms were normal before. has anyone else had a similar experience and can out my nerves at rest?