Neurodevelopmental Disorders & Learning Differences
Authored by: The DrSensory Editorial Team
Reviewed by: 🛡️ DrSensory Clinical Review Board
Last updated: June 2026
Key Takeaways
- Delayed speech is one of the most common developmental concerns for toddlers and young children, occurring when a child isn't developing speech at the expected rate for their age.
- Speech delay and language delay are different: speech delay is difficulty producing speech sounds, while language delay is difficulty understanding or using words meaningfully, and a child can have one or both.
- Warning signs include having no words by 15 to 18 months, inconsistent use of sounds, difficulty imitating sounds or gestures, and frustration when trying to communicate.
- Speech delays can have many causes, ranging from autism spectrum disorder, hearing loss, tongue-tie, and oral-motor weakness to chronic ear infections, limited verbal interaction, or excessive screen time with little back-and-forth communication.
- Early evaluation, often before age 3, is critical for better long-term outcomes, and a speech-language pathologist conducts a comprehensive evaluation to diagnose a speech delay.
| Age | Expected Speech Skills |
|---|---|
| 12 months | Babbles, says "mama/dada", responds to name |
| 18 months | Uses 10-20 words, name objects |
| 24 months | Says ~50 words, combines 2-word phrases |
| 3 years | Asks simple questions, speak in sentences |
| 4 years | Speech is mostly understood by others |
Frequently Asked Questions
When should I worry that my child isn't talking yet?
A speech evaluation is recommended if your child isn't meeting speech milestones. Signs to watch for include having no words by 15 to 18 months, inconsistent use of sounds, and difficulty imitating sounds or gestures.
What is the difference between a speech delay and a language delay?
A speech delay is difficulty producing speech sounds, while a language delay is difficulty understanding or using words meaningfully. Children can experience one or both.
What can cause a speech delay in my child?
Causes can include autism spectrum disorder, intellectual disabilities, childhood apraxia of speech, ADHD or executive function difficulties, hearing loss, tongue-tie, oral-motor weakness, and chronic ear infections. A lack of verbal interaction, trauma or neglect, and excessive screen time with limited back-and-forth communication can also play a role.
How is a speech delay diagnosed?
A speech-language pathologist conducts a comprehensive evaluation that may include observation and play-based assessment, speech sound analysis, receptive and expressive language testing, an oral motor examination, and a parent interview with developmental history. Early evaluation, often before age 3, is critical for better long-term outcomes.
What therapy options can help a child with delayed speech?
Speech therapy builds vocabulary, sound production, and sentence formation using play, repetition, and modeling, and may include augmentative and alternative communication (AAC) for nonverbal children. Therapy can also support sensory processing, fine motor skills, and feeding or oral-motor coordination when related, along with parent coaching and home strategies.
