Playing the Percentiles

Fiona had her 8-week check and immunisations on Thursday. They measured her weight, height and head circumference, and all of these measurements came out extremely large for her age. Specifically:

Measurement Value Percentile 50th Percentile at
Weight 6.32 kg (13.9 lb) 98th 17 weeks
Height 60.5 cm (25.2″) 98th 15 weeks
Head Circumference 41.5 cm (17.25″) 98th 16 weeks

So, in other words, she is a perfectly normal 4-month old baby…at eight weeks.