Re: Dropping percentile points, even on WHO chart?
The charts- both the new WHO charts and the old CDC charts- make it look like babies should always grow following those nice, smooth curves. But the truth is that babies don't grow that way. A baby's growth rate is changing all the time- and I don't just mean changing so it can follow the curve, in a calculus sense, but changing around a given curve. Sometimes the baby's growth will accelerate, sometimes it will slow down. It is entirely normal for healthy babies to shift percentiles no matter what chart you use.
Both my girls went all over the charts, both the CDC and the WHO ones. DD1 started small (20th %ile, approximately) and then shot up to the 99-100th %ile by a few months, and was down to the 75-80th by a year. DD2 did more or less the same thing, but started somewhat larger than DD1.
It sounds like you LO is fine!
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"