When did your baby first laugh?

DS is five months old and still hasn't laughed. Should I be worried?

He squeals and screeches and makes all sorts of noises - but he's not sounding out consanants either. He used to want to "chat" with us, but he's not really interested in that much either anymore. And it's more moans and noises than trying to mimic real language.

He smiles and makes eye contact, responds to our voices and other sounds/noises, sometimes makes these weird screeches/guffaws on an intake of breath that sound like goofy attempts at laughing, will smile and throw his head around in silent pleasure - but no belly laughs, no giggles. :( I once managed a chuckle out of him, but I've never heard it again, no matter how hard I try.

What age did your bubs start laughing? And should he be attempting to mimic us and make real sounds by now (like baba, mama, dada, etc)? Not as in, his first words, but trying to put together familiar sounds?

My DD was 10 weeks old when she first started to laugh it was more of a big smile with an "ahh" noise lol hard to explain but we didnt get a good belly laugh until 4ish months.

We've had giggles and squeals and smiles, but no huge belly laughs yet. DD is 6 months. I guess there hasn't been anything funny enough yet ;) DD says nana, dada, mama, baba, gaga, blabla (that's the BEST).

One of my nieces made no noise at all! She didn't even smile. She would just stare at us when we made funny noises or tickled her.

My DS did his first big belly laugh at 3 months of age. It took another week or so for him to do it again though. I'm sure it's nothing to worry about, he's probably just not seen anything he thinks is funny enough to warrant a belly laugh. Hope you get one soon though.