Autistic babies do smile, but often show delays or differences in social smiling, which typically emerges around 6-10 weeks in neurotypical babies; for autistic infants, these smiles may be less frequent, delayed past 4 months, or less reciprocal, often lacking the eye contact and shared enjoyment seen in typical development, with reduced social engagement becoming more apparent by 4-6 months and continuing to be less frequent than peers by 12 months.
A child at risk for autism may not smile or laugh in response to your smile or playfulness although he/she may smile at you on their own and look very happy.
The "6-second rule" for autism is a communication strategy where a speaker pauses for about six seconds after asking a question or giving information, giving the autistic person extra time to process it without feeling rushed, which helps reduce anxiety and allows for a more thoughtful response, reducing frustration for both parties. Instead of repeating or rephrasing, which can be confusing, you wait, and if needed, repeat the exact same words after the pause.
In some cases, babies with autism may show delayed emotional expression. While a neurotypical baby might immediately laugh when tickled, a child with autism might not display the same immediate emotional response. They might take longer to process the sensation and respond, or they might not laugh at all.
Delayed onset of smiling
Typically developing infants may start social smiling around two to three months, but babies with autism may take longer to do so. It's one of many atypical smiling patterns associated with an autism diagnosis.
Signs of autism in children
When should I worry about my baby not smiling? If you hit the 3-month mark without seeing a smile, bring it up with your pediatrician—it's possible there are other factors at play, such as hearing or vision impairments, or a developmental delay.
Developmental Delays in Children with Autism
Often children show symptoms of autism within the first year of life. A small number of children with the condition appear to develop as expected in the first year. Then between 18 and 24 months of age, they may lose some skills and develop autism symptoms.
Clear Indicators Your Toddler Is Not Autistic
They may initiate and respond to social cues, such as smiling, making eye contact, and showing interest in others. Additionally, they may demonstrate an understanding of basic social rules, such as taking turns and sharing toys.
Around 90% of autism cases are attributed to genetic factors, meaning autism is highly heritable, with many different genes contributing, rather than a single cause, often interacting with environmental influences during early brain development, though specific environmental factors don't cause it but can increase risk. Twin studies show strong genetic links, with concordance rates between 60-90% in identical twins, and research points to complex interactions of many genes and prenatal/perinatal factors.
Chinning is a form of repetitive self-stimulatory behavior (stimming) that you may notice in children or adults with autism. It involves pressing, rubbing, or holding the chin against objects, surfaces, or even hands to gain sensory input or comfort.
The three main symptom areas for Autism Spectrum Disorder (ASD) are persistent difficulties with social communication and interaction, restricted or repetitive patterns of behavior, interests, or activities, and often, different ways of learning, moving, or paying attention, all of which impact daily functioning. These core characteristics vary greatly but center on social connection challenges, rigid routines or repetitive actions, and sensory sensitivities.
Here are five common false signs of autism that are often misunderstood.
Research indicates that children with autism often display distinct morphological traits, such as a broader upper face, wider-set eyes, a larger mouth, and facial asymmetry. These physical features can reflect underlying neurodevelopmental processes and might serve as supplementary biomarkers for early screening.
The behavioral symptoms of autism spectrum disorder (ASD) often appear early in development. Many children show symptoms of autism by 12 months to 18 months of age or earlier. Some early signs of autism include: Problems with eye contact.
Research tells us that autism tends to run in families, and a meta-analysis of 7 twin studies claim that 60 to 90% of the risk of autism comes from your genome. If you have a child with autism, you are more likely to have another autistic child. Your other family members are also more likely to have a child with ASD.
Reaching to one's own forehead in response to a marked mirror image has traditionally been conceptualized as an important, initial measure of self awareness (the mirror self recognition test, or MSR, e.g. Gallup, 1970) and it typically emerges between the ages of 18 and 24 months (Bertenthal and Fischer, 1978).
As children develop speech, early warning signs of an ASD include scripted speech, echolalia, and using words out of context. as from a television program or movie. The child uses the phrase out of context, and it is not used in an attempt to communicate.
Babbling versus "jargon"
Many nonverbal individuals with autism produce jargon as a repetitive, self-stimulatory behavior. Typically, this type of jargon is not directed toward another person. On the other hand, in cases of speech-language delay, a child's babbling may indeed represent the precursors to speech.
Autistic infants often show an absence of typical infant behaviors. They appear calm, undemanding, quiet, and independent. These symptoms are often dismissed as signs of a 'mature, good baby'. Therefore, it is very important to go for autism screening if your child behaves differently from other infants their age.
In our experience, impairments in righting exist in autistic infants. Some cannot turn over at all.
Babies with autism smile but may not smile as much as babies without autism. Typically, a baby will smile back at you as early as six weeks, but certainly by four months. Children with autism tend to lack social smiling in response to your gestures.
By eight weeks (about two months), your baby may start to show social smiles. These are the real, intentional and responsive smiles when something catches their attention. “You'll start to notice that they're paying attention to voices and trying to respond, especially related to feeding cues,” Dr. Kaari says.
As with all things in child development, there's a range of normal when it comes to when babies smile. But if your baby doesn't show a social smile by around 2 months old, talk to your child's healthcare provider. This could be an early sign of a developmental delay that may need attention.