Research Cluster

Early Risk Markers and Birth History

This cluster groups studies that look at things happening before or right after birth—like mom’s age, early labor, or tiny body differences—that may hint a child could later be diagnosed with autism. It also shows that watching a baby’s social smiles, sounds, and how they react to sights or touches between 6 and 12 months can help spot signs early. Knowing these clues lets a BCBA start tracking development sooner and plan the right help without waiting for a full diagnosis. The papers remind us to focus on what the child can do today, not only on stories about lost skills.

83articles
1979–2026year range
5key findings
Key Findings

What 83 articles tell us

  1. Babies who breastfed for a shorter time or had latching trouble early on may have a higher chance of later autism diagnosis.
  2. Infants who needed early breathing support, such as a ventilator, show sharply higher odds of autism and ADHD.
  3. Some toddlers who later receive an autism diagnosis show fluid around the brain on MRI scans before age two.
  4. Reduced social attentiveness and poorer parent-infant interaction quality can appear as early as eight months in babies who go on to be diagnosed.
  5. Persistent early reflexes, like the snout reflex, are more common in children with autism and may signal a need for developmental screening.
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Frequently Asked Questions

Common questions from BCBAs and RBTs

Ask about breastfeeding duration, any latching or feeding problems, whether the baby needed breathing support, and how socially responsive the baby was in the first year.

Not always, but research shows that reduced social responsiveness, feeding difficulties, and certain brain differences can appear before age two, which supports earlier screening and monitoring.

No. If a child shows developmental concerns, early support is appropriate even without a confirmed diagnosis. You can track key milestones and build parent coaching plans right away.

Research shows the global average age of diagnosis is around five years old. Earlier identification and intervention leads to better outcomes, so knowing early risk markers helps you act sooner.

Focus your assessment on what the child can currently do. Children who lost skills may need different starting points in programming than those who never acquired them. Track regression history but plan from present abilities.