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Does My Child Have Autism?

How to Recognize the Early Signs and Symptoms of Autism

Early signs of autism

As a parent, you never want to believe that your precious bundle has a problem. But when it comes to autism, catching it early—ideally by the age of eighteen months—makes a huge difference. But no matter your child's age, don't lose hope. Treatment can reduce the disorder's effects and help your child learn, grow, and thrive.

What is autism?

Autism is a spectrum of closely related disorders with a shared core of symptoms. Autism spectrum disorder appears in infancy and early childhood, causing delays in many basic areas of development, such as learning to talk, play, and interact with others.

The signs and symptoms of autism vary widely, as do its effects. Some children with autism have only mild impairments, while others have more obstacles to overcome. However, every child on the autism spectrum has problems, at least to some degree, in the following three areas:

  • Communicating verbally and non-verbally
  • Relating to others and the world around them
  • Thinking and behaving flexibly

There are different opinions among doctors, parents, and experts about what causes autism and how best to treat it. There is one fact, however, that everyone agrees on: early and intensive intervention helps. For children at risk and children who show early signs, it can make all the difference.

One baby's story

Melanie is a healthy one-year old, but her parents are worried about her development because she’s not doing many things that her older brother did at her age, like playing peek-a-boo and mimicking expressions and gestures. Melanie’s mom and dad try to engage her with toys, songs, and games, but nothing they do gets her interest, let alone a laugh or a smile. In fact, she rarely makes eye contact. And although her hearing has been checked and is normal, she doesn’t babble, make other baby noises, or respond when her parents call her name. Melanie needs to be checked out by a child development specialist right away.

How parents can spot the warning signs

As a parent, you’re in the best position to spot the earliest warning signs of autism. You know your child better than anyone and observe behaviors and quirks that a pediatrician, in a quick fifteen-minute visit, might not have the chance to see. Your child’s pediatrician can be a valuable partner, but don’t discount the importance of your own observations and experience. The key is to educate yourself so you know what’s normal and what’s not.

Monitor your child’s development. Autism involves a variety of developmental delays, so keeping a close eye on when—or if—your child is hitting the key social, emotional, and cognitive milestones is an effective way to spot the problem early on. While developmental delays don’t automatically point to autism, they may indicate a heightened risk.

Take action if you’re concerned. Every child develops at a different pace, so you don’t need to panic if your child is a little late to talk or walk. When it comes to healthy development, there’s a wide range of “normal.” But if your child is not meeting the milestones for his or her age, or you suspect a problem, share your concerns with your child’s doctor immediately. Don’t wait.

Don’t accept a wait-and-see approach. Many concerned parents are told, “Don’t worry” or “Wait and see.” But waiting is the worst thing you can do. You risk losing valuable time at an age where your child has the best chance for improvement. Furthermore, whether the delay is caused by autism or some other factor, developmentally delayed kids are unlikely to simply “grow out of” their problems. In order to develop skills in an area of delay, your child needs extra help and targeted treatment.

Trust your instincts. Ideally, your child’s doctor will take your concerns seriously and perform a thorough evaluation for autism or other developmental delays. But sometimes, even well-meaning doctors miss red flags or underestimate problems. Listen to your gut if it’s telling you something is wrong, and be persistent. Schedule a follow-up appointment with the doctor, seek a second opinion, or ask for a referral to a child development specialist.

Regression of any kind is a serious autism warning sign

Some children with autism spectrum disorder start to develop communication skills and then regress, usually between 12 and 24 months. For example, a child who was communicating with words such as “mommy” or “up” may stop using language entirely, or a child may stop playing social games he or she used to enjoy such as peek-a-boo, patty cake, or waving “bye-bye.” Any loss of speech, babbling, gestures, or social skills should be taken very seriously, as regression is a major red flag for autism.

Signs and symptoms of autism in babies and toddlers

If autism is caught in infancy, treatment can take full advantage of the young brain’s remarkable plasticity. Although autism is hard to diagnose before 24 months, symptoms often surface between 12 and 18 months. If signs are detected by 18 months of age, intensive treatment may help to rewire the brain and reverse the symptoms.

The earliest signs of autism involve the absence of normal behaviors—not the presence of abnormal ones—so they can be tough to spot. In some cases, the earliest symptoms of autism are even misinterpreted as signs of a “good baby,” since the infant may seem quiet, independent, and undemanding. However, you can catch warning signs early if you know what to look for.

Some autistic infants don't respond to cuddling, reach out to be picked up, or look at their mothers when being fed.

Early signs

Your baby or toddler doesn't:

  1. Make eye contact, such as looking at you when being fed or smiling when being smiled at
  2. Respond to his or her name, or to the sound of a familiar voice
  3. Follow objects visually or follow your gesture when you point things out
  4. Point or wave goodbye, or use other gestures to communicate
  5. Make noises to get your attention
  6. Initiate or respond to cuddling or reach out to be picked up
  7. Imitate your movements and facial expressions
  8. Play with other people or share interest and enjoyment
  9. Notice or care if you hurt yourself or experience discomfort

Developmental red flags

The following delays warrant an immediate evaluation by your child’s pediatrician:

By 6 months: No big smiles or other warm, joyful expressions

By 9 months: No back-and-forth sharing of sounds, smiles, or other facial expressions

By 12 months: Lack of response to name

By 12 months: No babbling or “baby talk”

By 12 months: No back-and-forth gestures, such as pointing, showing, reaching, or waving

By 16 months: No spoken words

By 24 months: No meaningful two-word phrases that don’t involve imitating or repeating

Signs and symptoms in older children

As children get older, the red flags for autism become more diverse. There are many warning signs and symptoms, but they typically revolve around impaired social skills, speech and language difficulties, non-verbal communication difficulties, and inflexible behavior.

Signs of social difficulties

  1. Appears disinterested or unaware of other people or what’s going on around them
  2. Doesn’t know how to connect with others, play, or make friends
  3. Prefers not to be touched, held, or cuddled
  4. Doesn’t play "pretend" games, engage in group games, imitate others, or use toys in creative ways
  5. Has trouble understanding feelings or talking about them
  6. Doesn’t seem to hear when others talk to him or her
  7. Doesn't share interests or achievements with others (drawings, toys)

Basic social interaction can be difficult for children with autism spectrum disorder. Many kids on the autism spectrum seem to prefer to live in their own world, aloof and detached from others.

Signs of speech and language difficulties

  1. Speaks in an abnormal tone of voice, or with an odd rhythm or pitch (e.g. ends every sentence as if asking a question)
  2. Repeats the same words or phrases over and over, often without communicative intent
  3. Responds to a question by repeating it, rather than answering it
  4. Uses language incorrectly (grammatical errors, wrong words) or refers to him or herself in the third person
  5. Has difficulty communicating needs or desires
  6. Doesn’t understand simple directions, statements, or questions
  7. Takes what is said too literally (misses undertones of humor, irony, and sarcasm)

Children with autism spectrum disorder have difficulty with speech and language. Often, they start talking late.

Signs of nonverbal communication difficulties

  1. Avoids eye contact
  2. Uses facial expressions that don't match what he or she is saying
  3. Doesn’t pick up on other people’s facial expressions, tone of voice, and gestures
  4. Makes very few gestures (such as pointing). May come across as cold or “robot-like.”
  5. Reacts unusually to sights, smells, textures, and sounds. May be especially sensitive to loud noises. Can also be unresponsive to people entering/leaving, as well as efforts by others to attract the child’s attention.
  6. Abnormal posture, clumsiness, or eccentric ways of moving (e.g., walking exclusively on tiptoe)

Children with autism spectrum disorder have trouble picking up on subtle nonverbal cues and using body language. This makes the "give-and-take" of social interaction very difficult.

Signs of inflexibility

  1. Follows a rigid routine (e.g., insists on taking a specific route to school)
  2. Has difficulty adapting to any changes in schedule or environment (e.g., throws a tantrum if the furniture is rearranged or bedtime is at a different time than usual)
  3. Unusual attachments to toys or strange objects such as keys, light switches, or rubber bands. Obsessively lines things up or arranges them in a certain order.
  4. Preoccupation with a narrow topic of interest, often involving numbers or symbols (e.g., memorizing and reciting facts about maps, train schedules, or sports statistics)
  5. Spends long periods watching moving objects such as a ceiling fan, or focusing on one specific part of an object such as the wheels of a toy car
  6. Repeats the same actions or movements over and over again, such as flapping hands, rocking, or twirling (known as self-stimulatory behavior, or “stimming”). Some researchers and clinicians believe that these behaviors may soothe children with autism more than stimulate them.

Children with autism spectrum disorder are often restricted, inflexible, and even obsessive in their behaviors, activities, and interests.

Common restricted and repetitive behaviors

Hand flapping

Tapping ears

Rocking back and forth

Scratching

Spinning in a circle

Lining up toys

Finger flicking

Spinning objects

Head banging

Wheel spinning

Staring at lights

Watching moving objects

Moving fingers in front of the eyes

Flicking light switches on and off

Snapping fingers

Repeating words or noises

Causes of autism

Until recently, most scientists believed that autism is caused mostly by genetic factors. But groundbreaking new research indicates that environmental factors may also be important in the development of autism.

Babies may be born with a genetic vulnerability to autism that is then triggered by something in the external environment, either while he or she is still in the womb or sometime after birth.

It’s important to note that the environment, in this context, means anything outside the body. It’s not limited to things like pollution or toxins in the atmosphere. In fact, one of the most important environments appears to be the prenatal environment.

Prenatal factors that may contribute to autism

Taking antidepressants during pregnancy, especially in the first 3 months

Nutritional deficiencies early in pregnancy, particularly not getting enough folic acid

The age of the mother and father

Complications at or shortly after birth, including very low birth weight and neonatal anemia

Maternal infections during pregnancy

Exposure to chemical pollutants, such as metals and pesticides, while pregnant

More research on these prenatal risk factors is needed, but if you’re pregnant or trying to conceive, it can’t hurt to take steps now to reduce your baby’s risk of autism.

Reducing the risk of autism: Tips for expectant mothers

Take a multivitamin. Taking 400 micrograms of folic acid daily helps prevent birth defects such as spina bifida. It’s not clear whether this will also help reduce risk of autism, but taking the vitamins can’t hurt.

Ask about SSRIs. Women who are taking an SSRI (or who develop depression during pregnancy) should talk with a clinician about all the risks and benefits of these drugs. Untreated depression in a mother can also affect her child’s well-being later on, so this is not a simple decision to make.

Practice prenatal care. Eating nutritious food, trying to avoid infections, and seeing a clinician for regular check-ups can increase the chances of giving birth to a healthy child.

Source: Harvard Health Publications

Autism and vaccines

While you can’t control the genes your child inherits, or shield him or her from every environmental danger, there is one very important thing you can do to protect the health of your child: make sure he or she is vaccinated on schedule.

Despite a lot of controversy on the topic, scientific research does not support the theory that vaccines or their ingredients cause autism. Five major epidemiologic studies conducted in the U.S., UK, Sweden, and Denmark, found that children who received vaccines did not have higher rates of autism. Additionally, a major safety review by the Institute of Medicine failed to find any evidence supporting the connection. Other organizations that have concluded that vaccines are not associated with autism include the Centers for Disease Control and Prevention (CDC), the U.S. Food and Drug Administration (FDA), the American Academy of Pediatrics, and the World Health Organization (WHO).

Myths and facts about childhood vaccinations

Myth: Vaccines aren't necessary.

Fact: Vaccines protect your child from many serious and potentially deadly diseases, including measles, meningitis, polio, tetanus, diphtheria, and whooping cough. These diseases are uncommon today because vaccines are doing their job. But the bacteria and viruses that cause these diseases still exist and can be passed on to children who aren’t immunized.

Myth: Vaccines cause autism.

Fact: Despite extensive research and safety studies, scientists and doctors have not found a link between childhood vaccinations and autism or other developmental problems. Children who are not vaccinated do not have lower rates of autism spectrum disorders.

Myth: Vaccines are given too early.

Fact: Early vaccination protects your child from serious diseases that are most likely to occur—and most dangerous—in babies. Waiting to immunize your baby puts him or her at risk. The recommended vaccination schedule is designed to work best with children’s immune systems at specific ages. A different schedule may not offer the same protection.

Myth: Too many vaccines are given at once.

Fact: You may have heard theories that the recommended vaccine schedule overloads young children’s immune systems and may even cause autism. But research shows that spacing out vaccinations doesn’t improve children’s health or lower their risk of autism, and as noted above, actually puts them at risk for potentially fatal diseases.

What to do if you’re worried

If your child is developmentally delayed, or if you’ve observed other red flags for autism, schedule an appointment with your pediatrician right away. In fact, it’s a good idea to have your child screened by a doctor even if he or she is hitting the developmental milestones on schedule. The American Academy of Pediatrics recommends that all children receive routine developmental screenings, as well as specific screenings for autism at 9, 18, and 30 months of age.

Schedule an autism screening. A number of specialized screening tools have been developed to identify children at risk for autism. Most of these screening tools are quick and straightforward, consisting of yes-or-no questions or a checklist of symptoms. Your pediatrician should also get your feedback regarding your child’s behavior.

See a developmental specialist. If your pediatrician detects possible signs of autism during the screening, your child should be referred to a specialist for a comprehensive diagnostic evaluation. Screening tools can’t be used to make a diagnosis, which is why further assessment is needed. A specialist can conduct a number of tests to determine whether or not your child has autism. Although many clinicians will not diagnose a child with autism before 30 months of age, they will be able to use screening techniques to determine when a cluster of symptoms associated with autism is present.

Seek early intervention services. The diagnostic process for autism is tricky and can sometimes take a while. But you can take advantage of treatment as soon as you suspect your child has developmental delays. Ask your doctor to refer you to early intervention services. Early intervention is a federally funded program for infants and toddlers with disabilities. Children who demonstrate several early warning signs may have developmental delays. They will benefit from early intervention whether or not they meet the full criteria for an autism spectrum disorder. In other words, there is more risk involved in the wait-and-see approach than in receiving early intervention.

More help for Autism

Resources and references

General information about autism

Autism Spectrum Disorders – Learn the signs and symptoms of autism and other pervasive developmental disorders. Includes information about causes and treatment. (National Institute of Mental Health)

What is Autism? – Introduction to autism, including possible causes and how common it is, with links to many more helpful resources. (Autism Speaks)

Early warning signs

First Signs – Non-profit organization dedicated to educating parents and pediatric professionals about the early warning signs of autism and other developmental disorders. Helpful articles include Hallmark Developmental Milestones and Early Intervention. (First Signs)

Learn the Signs. Act Early – Government resource on child development, including important developmental milestones and warnings signs and symptoms of developmental delays. (Centers for Disease Control)

Early Features of Autism – Fact sheet from the Australian Child to Adult Development Study covers the early warning signs and symptoms of autism. (ACT-NOW)

Autism: Recognizing the Signs in Young Children – Covers early red flags for autism and the reasons why early diagnosis is so important. (The National Autistic Society)

Autism screening

Sharing Concerns: Parent to Physician – Features tips on how to effectively communicate with the doctor regarding your concerns about your child. (First Signs)

Screening: Making Observations – Overview of developmental screening and how they can identify autism and other problems early. (First Signs)

Making Early Developmental Screenings Routine – Article on early developmental screenings for autism and how you can be an advocate for your child. (Spark Action)

What other readers are saying

“I would like to take the opportunity to thank you for your web site. We just learned my two year old grandson is autistic . . . Reading your information on early signs, if I [had] known about this, it would of helped with my now 24-year-old son who also had all the signs of autism. If I knew back then my son wouldn’t have had to live a life long struggle. Because of you I can learn to communicate with my grandson better. Thank you for all the research you provided. Now teenage mothers can get the help early instead waiting like I did.” ~ Arizona

Authors: Melinda Smith, M.A., Jeanne Segal, Ph.D., and Ted Hutman, Ph.D. Last updated: October 2016.

Ted Hutman, Ph.D. is Assistant Clinical Professor in Psychiatry at the David Geffen School of Medicine at UCLA and a licensed clinical psychologist practicing in Santa Monica, CA.