As a parent, watching your child grow and develop is exciting. From first smiles to first words, every milestone matters. But when developmental differences begin to appear, many parents start asking important questions about communication, behavior, and social interaction.
Understanding autism developmental milestones can help families identify potential signs of autism spectrum disorder (ASD) early and seek support as soon as possible. For parents in the greater Denver area, early intervention and behavioral support services can play a critical role in helping children thrive.
At BehaviorSpan, families throughout the Denver metro area receive compassionate behavioral support designed to help children build communication, social, and developmental skills in a supportive environment.
What Are Autism Developmental Milestones?
Developmental milestones are skills that most children typically achieve by certain ages. These milestones include:
- Social interaction
- Language and communication
- Emotional development
- Physical movement
- Cognitive abilities
Children with autism may reach these milestones differently or at a slower pace than their peers. According to the CDC, developmental monitoring helps parents recognize potential concerns early so they can access evaluations and support if needed.
Because autism affects children in different ways, developmental signs can appear at different ages. Some children show early developmental delays, while others may not display noticeable social or communication differences until toddlerhood or preschool years.
Why Early Autism Screening Matters
Research shows that early identification and intervention can improve communication, learning, adaptive behaviors, and social development in children with autism.
The National Institute of Mental Health explains that early diagnosis allows families to begin therapies and developmental support sooner, which may lead to better long-term outcomes.
For families in the Denver metro area, finding trusted behavioral support early can make a meaningful difference in a child’s growth and confidence.
BehaviorSpan offers individualized support programs designed to help children develop essential life, communication, school-readiness skills.
Autism Developmental Milestones by Age
Birth to 6 Months
During the first six months of life, babies begin engaging socially and responding to their environment.
Typical Developmental Milestones
- Smiling at caregivers
- Making eye contact
- Responding to sounds and voices
- Showing interest in faces
- Cooing and vocalizing
Possible Early Autism Signs
- Limited eye contact
- Reduced social smiling
- Minimal facial expressions
- Lack of response to voices
- Limited interest in interaction
While autism is rarely diagnosed this early, some developmental differences may begin appearing during infancy.
6 to 12 Months
At this age, babies typically become more socially interactive and communicative.
Typical Milestones
- Responding to their name
- Babbling frequently
- Laughing and expressing emotion
- Using gestures like pointing or waving
- Enjoying social games
Possible Autism Indicators
- Not responding to their name
- Limited babbling
- Reduced gestures
- Minimal social engagement
- Repetitive body movements
Parents who notice developmental concerns should speak with their pediatrician about developmental screening options.
12 to 18 Months
This stage often includes rapid communication and social development.
Typical Milestones
- Saying simple words
- Pointing to objects
- Following simple instructions
- Engaging in pretend play
- Showing curiosity about others
Possible Autism Signs
- Delayed speech development
- Lack of pointing or gestures
- Limited pretend play
- Reduced social interaction
- Repetitive behaviors
Some children with autism may experience developmental regression, where previously learned words or social skills decrease between 18 and 24 months.
For families in the Denver metro area, early behavioral intervention services like BehaviorSpan can help strengthen communication, independence, social development, and emotional development skills, helping children build the foundation they need to thrive during these critical years.
18 to 24 Months
By this age, developmental differences may become more noticeable.
Typical Milestones
- Combining two-word phrases
- Following simple directions
- Showing empathy
- Exploring their environment
- Engaging with peers
Possible Autism Signs
- Loss of language skills
- Difficulty with transitions
- Intense focus on specific objects
- Limited peer interaction
- Repetitive movements like hand flapping
The American Academy of Pediatrics recommends autism-specific screenings at both 18 and 24 months. Early screening helps families access developmental resources sooner.
Autism Signs During Preschool Years
As children grow, social communication demands increase in preschool and classroom settings.
Typical Preschool Milestones
- Speaking in full sentences
- Participating in group play
- Understanding emotions
- Asking questions
- Using imagination during play
Possible Autism Signs in Preschoolers
- Difficulty with back-and-forth conversation
- Sensory sensitivities
- Strong preference for routines
- Literal interpretation of language
- Challenges making friends
Children with autism may also experience:
- Difficulty adapting to changes
- Emotional regulation challenges
- Repetitive play patterns
- Intense special interests
At BehaviorSpan, families can access behavioral support programs focused on helping children strengthen communication, social interaction, emotional regulation, and daily living skills.
Common Early Signs of Autism
Although autism presents differently in every child, some commonly recognized signs include:
- Limited eye contact
- Delayed speech
- Repetitive behaviors
- Sensory sensitivities
- Difficulty with social interaction
- Delayed pretend play
- Resistance to changes in routine
- Unusual responses to sounds, textures, or lights
Having one or two signs alone does not necessarily mean a child has autism. Developmental evaluations consider a child’s overall behavior and developmental patterns.
Developmental Delays vs. Developmental Differences
It’s important to understand that autism is not simply about being “behind.” Many autistic children have advanced strengths in specific areas while needing support in others.
For example:
- A child may have advanced memory skills but delayed social communication.
- Another may read early but struggle with emotional regulation.
- Some children may develop strong problem-solving abilities alongside sensory sensitivities.
Every child develops uniquely, and support should always be individualized.
What Parents Should Do If They Have Concerns
If you notice delays or behavioral differences, taking action early is important.
1. Talk to Your Pediatrician
Discuss specific behaviors or developmental concerns you’ve observed.
2. Request Developmental Screening
Screening tools help determine whether further evaluation may be beneficial.
3. Explore Early Intervention Services
Support services may include:
- Speech therapy
- Occupational therapy
- Behavioral therapy
- Social skills support
4. Find Local Autism Support Resources
Families in the Denver metro area can benefit from working with experienced behavioral professionals who understand autism and child development.
BehaviorSpan provides personalized behavioral support services for children and families throughout:
- Aurora, CO
- Denver, CO
- Surrounding Colorado communities
How BehaviorSpan Supports Children with Autism
BehaviorSpan works with children and families to build developmental, behavioral, and communication skills through individualized support programs.
Their team focuses on helping children:
- Improve communication
- Strengthen social interaction
- Develop emotional regulation skills
- Build daily living abilities
- Increase independence and confidence
- Prepare for a typical school environment
Families in the Denver Metro area trust BehaviorSpan because of their compassionate, evidence-based approach to behavioral support.
Supporting Your Child’s Development at Home
Parents can also encourage developmental growth through everyday activities.
Helpful strategies include:
- Reading together daily
- Encouraging play-based communication
- Creating predictable routines
- Supporting sensory needs
- Celebrating small victories
- Practicing patience and consistency
Children thrive when they feel safe, supported, and understood.
Frequently Asked Questions About Autism Developmental Milestones
What are autism developmental milestones?
Autism developmental milestones refer to social, communication, behavioral, and developmental skills that may develop differently in children with autism spectrum disorder.
When should parents worry about autism developmental milestones?
Parents should speak with a pediatrician if they notice delays in speech, social interaction, eye contact, or other autism developmental milestones listed above.
Can autism developmental milestones improve with early intervention?
Yes, early intervention and behavioral support can help children strengthen communication, social, and developmental skills.
Final Thoughts on Autism Developmental Milestones
Understanding autism developmental milestones can help parents recognize developmental differences early and seek the support their child may need.
Every child develops differently, and autism does not define a child’s potential. With early intervention, individualized support, and compassionate guidance, children with autism can continue developing important skills and thrive in their own unique ways.
If you have concerns about your child’s development or want guidance on autism developmental milestones, the team at BehaviorSpan is here to help! Our compassionate specialists provide personalized behavioral support for children and families throughout Aurora, Denver, and surrounding Colorado communities. Contact BehaviorSpan today to learn more about our autism services and find the right care and support for your child’s unique needs!