My DS (8 weeks old) is having his head circumference checked every week as the HV is concerned that the rate of growth is too slow. His head was 36cm at birth, APPARENTLY 38.5cm at 2 weeks, 38cm at 7 weeks and 38.1cm at 8 weeks. Its beyond me how they can be that accurate with the measurement and I think the second measurement must have been wrong. The 1st measurement put him on the 75th/50th centile, the second on the 91st, 50th for the 3rd measurement, and between 50th and 25th today - basically all over the place!. My DS seems to be coming along well. He is smiling and cooing, although the doctor did pick up that his fontanelle was on the small side last week(following the HV speaking to her about the head growth). I keep veering between being sure that everything is okay because he seems so fine, and being convinced the HV and doctor are picking up on some massive problem!!!!! Am dreading going back to the doctor next week for the next check. Has anyone had experience of the same issue and how did it turn out? (BTW, he is on 50th centile for weight, and 91st for length).