If you mean a recent study reporting a possible connection to how autism develops, there are several studies in 2026 that could fit that description. One particularly relevant study found differences in brain connectivity during infancy in children who were later diagnosed with autism.
What the study found
A 2026 study examined EEG recordings from 238 children between 3 and 36 months of age. Of these, 58 were later diagnosed with autism and 180 were not. The researchers focused on alpha-band functional connectivity—essentially, how coordinated electrical activity was between different parts of the developing brain.
The important finding was that the two groups did not simply have different brain connectivity at one particular age. Instead, the way connectivity changed over the first three years of life was different.
- During the first year, connectivity measures increased rapidly in both groups.
- Later, connectivity measures tended to decline in the children who were later diagnosed with autism, while they continued to increase gradually in the comparison group.
- At around 3 months, researchers found both unusually high and unusually low connectivity in different brain networks.
- By 24 and 36 months, a pattern of reduced connectivity was more apparent in some networks.
- Interestingly, the researchers found evidence that early hyperconnectivity could precede later hypoconnectivity.
Why this is potentially important
The study suggests that autism-related differences may involve how brain networks develop and reorganize over time, rather than there being one fixed brain abnormality present from the beginning.
In other words, the researchers are proposing a developmental process somewhat like:
early brain-network differences → altered development of connectivity → later differences in communication and behavior
The study also found relationships between these connectivity patterns and later language outcomes, suggesting that changes in brain-network organization may be connected with aspects of developmental outcome.
However, this does not prove that altered connectivity causes autism. The researchers observed an association in children who later received an autism diagnosis. More studies are needed to determine whether the brain changes are a cause, an early characteristic of autism, or part of a more complicated developmental process.
Another important 2026 finding: genes and brain development
Separate research from UT Southwestern has been looking at autism-associated genes and how they affect the formation of connections between neurons.
Researchers studying the UBE3B gene found that loss of this autism-associated gene disrupted the formation and maturation of neuronal connections in experimental models. This produced weaker signaling between neurons and altered circuits involved in social behavior, learning, memory and communication.
This is important because it provides a possible biological mechanism:
genetic variation → altered neuronal development → altered brain circuitry → differences in neurodevelopment
But again, autism is highly heterogeneous. There isn’t one gene or one biological pathway responsible for all autism.
What about pregnancy and environmental factors?
Research also continues to investigate factors occurring before birth and during early development.
A 2026 birth-cohort study reported associations between later autism diagnosis and several factors, including certain aspects of maternal health, some environmental exposures and socioeconomic circumstances. Importantly, these are associations, not proof that any individual factor causes autism.
Another 2026 study examined the amygdala, a brain region involved in processing emotion and social information. Researchers found that aspects of neonatal amygdala microstructure and connectivity were associated with autistic traits measured at age 2. The study involved 174 infants and also examined the relationship with prenatal maternal stress.
The bigger picture
Current research increasingly points toward autism arising from an interaction of genetic and developmental factors, rather than a single cause.
A simplified model is:
Genetic susceptibility
↓
Early brain development
↓
Formation and organization of neural networks
↓
Differences in communication between brain regions
↓
Differences in language, social communication, sensory processing and behavior
Environmental and prenatal factors may influence this developmental process in some children, potentially interacting with genetic susceptibility.
Importantly, autism is a neurodevelopmental condition, and researchers do not currently have evidence that there is one single event that “causes” autism. The CDC’s large SEED research program similarly investigates multiple genetic, environmental, developmental and behavioral factors rather than assuming a single cause
One especially important distinction
If you saw a headline saying “study identifies a connection to autism development,” the word connection is crucial. Scientific studies often find that two things are associated, but that does not establish:
“X causes autism.”
For example, finding altered brain connectivity in babies who later develop autism tells researchers that the connectivity pattern may be an early marker or part of the developmental pathway. It does not yet establish that changing that connectivity would prevent autism.
If you tell me the headline, study topic, or the factor mentioned in the study (for example, gut bacteria, stress during pregnancy, brain connectivity, a particular gene, medication, chemical exposure, etc.), I can explain that specific study in detail—including methodology, participants, results, possible mechanism, limitations, and what it means for autism development, without giving you any links.