My son's pediatrician told me to call Early Intervention because he's delayed in talking.
Oh no, I'm sorry to hear that. Do they have any idea what the cause may be yet?
Not at all.  I'm hoping he'll catch up soon.  The appointment is set for next week and I'm pretty nervous.
I hope it's nothing too serious. My younger brother had the same problem early on, but he turned out to just be a slow developer.