Juzus, Ruffles & Vanilla, don't worry, minibee also considered on the small side only 25th percentile, like Vicky, Minibee also 5.5kg at 4 mths and could flip then. I told my PD i was worried and his reply was someone had to be the little guy and asured me she is very healthy and we have been doing a good job. She is just petite. However at 5 months, she just suddenly flipped one day and since we introduced some solids to her (pd recommended to start at 5 mths) she has grown quite a bit!!! So dun beat yourselves up abt it. U guys are doing well mummies!!