Amy has discoverd her thumbs and now sucks her thumb which is cute. I don't have a problem with her sucking her thumb and she comforts herself if she wakes during the night so we don't need a dummy much. I was wondering if you can tell if they are going to be left or right handed depending on which thumb they suck? Also, how long do they usually do it for? She was originally sucking on her right thumb but now does both. Could this become a problem? I'm not too worried ATM but she does suck her thumb a lot during the day now but I think it is more exploration and her natural sucking. I suppose it does have it's advantages over a dummy and she is not really interested in a dummy anymore.

Also something unrelated, Amy is 16 weeks today. Do you class that as 4 months old or wait until the calendar month of the birth date? ie 4th November for Amy.