What Is Autism Screening at 18 Months?

PostedNovember 10, 2025

UpdatedNovember 10, 2025

ByMy Patient Advice

Author: Lucia Alvarez, MSc | Reviewed by: Dr. Rebecca Fernandez, MBBS

Autism screening at 18 months is an essential step in identifying early signs of autism spectrum disorder (ASD). At this critical age, children are typically reaching key developmental milestones, and early detection can significantly improve the chances of accessing timely interventions. Autism screenings at this stage focus on social, communication, and behavioural development, helping professionals identify whether a child might need further evaluation or support.

The Importance of Autism Screening at 18 Months

Here’s why autism screening at 18 months is so important:

Early Detection:

Research has shown that children who receive early support, particularly before the age of three, are more likely to make significant developmental progress. By screening at 18 months, healthcare providers can identify red flags early and recommend interventions that can improve outcomes in communication, social skills, and behaviour.

Toddler Screening:

It involves questionnaires, observations, and a review of the child’s social and communication behaviours. At this age, children may show early signs such as limited eye contact, delayed speech, or difficulty engaging in reciprocal play. Identifying these signs early ensures that any concerns are addressed before they become more significant for developmental delays.

Developmental Milestones:

During developmental milestones, such as language development, social interaction, and motor skills, there are specific behaviours that clinicians look for during autism screenings. Delayed or atypical development in these areas may indicate a need for further assessment, making autism screening at 18 months a valuable tool for identifying children who may benefit from additional evaluation.

Autism screening at 18 months is a vital step in identifying early signs of autism, leading to timely interventions that can make a positive impact on a child’s development. For expert advice and personalised consultations, visit providers like Autism Detect to guide you through the screening and diagnostic process.

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Autism Screening and Assessment Tools.

Lucia Alvarez, MSc

Author

Lucia Alvarez is a clinical psychologist with a Master’s in Clinical Psychology and extensive experience providing evidence-based therapy and psychological assessment to children, adolescents, and adults. Skilled in CBT, DBT, and other therapeutic interventions, she has worked in hospital, community, and residential care settings. Her expertise includes grief counseling, anxiety management, and resilience-building, with a strong focus on creating safe, supportive environments to improve mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the author's privacy.

Dr. Rebecca Fernandez, MBBS

Reviewer

Dr. Rebecca Fernandez is a UK-trained physician with an MBBS and experience in general surgery, cardiology, internal medicine, gynecology, intensive care, and emergency medicine. She has managed critically ill patients, stabilised acute trauma cases, and provided comprehensive inpatient and outpatient care. In psychiatry, Dr. Fernandez has worked with psychotic, mood, anxiety, and substance use disorders, applying evidence-based approaches such as CBT, ACT, and mindfulness-based therapies. Her skills span patient assessment, treatment planning, and the integration of digital health solutions to support mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the reviewer's privacy.