When did you first hear your baby laugh? My pedi asked me if she was laughing at her 4 month check up last week and seemed a bit surprised when I said she hasn't yet. He asked if she was vocalizing and I said yes, but all she says is aaaahhh's. He is going to do a hearing test at here 6 month check up to be sure because she also doesn't look at anyone when you talk to here. Should I be concerned that the lack of laugh could be something more serious?
Re: laughing
At his 4 month check up, my DS wasn't laughing a lot, but he did laugh some. Since his checkup though, he's been a crazy boy, screaming and laughing!
That said, I wouldn't be concerned until there was a definite answer. I personally don't think it is something to worry about right now, but I know from experience that you can't just tell someone not to worry and expect them to be fine.
Good luck!