My daughter is eleven months old with a head circumference of 41cm, she is not on any centile and we already have a diagnosis of c.p but have been told this is a sign of severe learning difficulties and developmental delay, she is not sitting up unaided and has regular physio and we have been told shes about 3-4 months behind. I seem to be freaking out about this and as she is our only child am preparing for the very worst. I have quite a small head but her size has not grown in months. Will this have a major bearing on the ultimate outcome or not?