Sorry I've been away for so long.
Many people are conerned about their child's speech. Here are the major developmental milestones:
Babies should begin to coo at 4 months. This is a consanant free sound "OOOEEEAAA".
They should be babbling by 4 months "BABBAABAGOO".
They typically have two words by 12 months Mama and one other.
We expect to see 3-5 words by 15 months and 15 words by 18 months.
At two years we hope to see at least 1 two word sentence such as "Mama, NO!" and a 50 word vocabulary. Typically strangers can understand 1/2 of their speech at two.
By three they should have too many words to count and several prepositions such as over, under, in, out, on and should be understandable by strangers 2/3 of the time.
If your child isn't meeting these milestones, ask your physician for formal screening.
Kevin M. Windisch, MD, FAAP
Sparks Pediatric and Adolescent Medicine
975 Roberta Lane #101B
Sparks, NV 89431
775-359-7111