Hey Gemma,

Kynan sucks both his thumbs as well (he hates dummies LOL), more his left now though. My CHN gave me some info which said that at this age babies aren't left or right handed, that doesn't develop until quite a bit later (can't find the papers now so I'm not sure at what age it does develop). She also told me not to worry about the thumb sucking causing any problems and that in most cases they stop sucking their thumbs before school age.

Oh and go by calender months

HTH.