My children have all been SO different. My firstborn was not very vocal, at all. Not even many sounds. He said maybe half a dozen words (and that is a stretch) by 18 months. My fourth child is a lot like him. He is 18 months and says 2 words. :D Anyway, my first didn't really start talking until he was 3 years old. But when he started, he started in sentences. Mostly.
My second born was a little more normal. But still behind the normal curve. He was talking by 2 years old. Simple sentences.
My third, imo, is a bit advanced (but then maybe I think that because of my first two!). She is 2 years old and has excellent grammar, complex sentences, good pronunciation, hundreds and hundreds of words in her vocab! And she was like that before she turned 2.
I guess my point is, there is a normal, yet before or after that is still normal and may be what is normal for your child. :D
at 1:09 PM on May. 16, 2011