Hi K8 - My (first) HV always reassured me by saying that most babies will have a 'wobble' and not consistently put on weight, she used to say as long as my little fella was between the very top and very bottom lines then not to worry. I was very lucky as she was a wonderful HV - every other one I've ever met has made me feel like a crap mum or guilty for something!! As long as you feel your baby is ok - then stick with your instincts - you know best. (ps 98th centile would mean 98% of other kids are lighter than your child - ie the top of the chart, 10th percentile (lower end of chart) means that 90% of other kids are heavier - does that help at all? ?? ) Take care xx