Auditory Comprehension (Receptive Language) and Expressive Communication (Expressive Language) develop at birth.
These skills are automatic responses to the world happening around them. From eye contact to smiling at a familiar face, these skills are acquired daily through interactions.
Receptive and expressive language skills are typically acquired around the same age for every child. However, when there is a delay, this is when it is recommended to seek professional help by a speech language pathologist, as they are the only professional who can diagnose receptive and expressive language disorders.