Which condition is likely to cause developmental delays and behavioral disorders in a child?

Fragile X syndrome is a genetic condition that is the most common inherited cause of intellectual disability and is strongly associated with developmental delays and behavior disorders in children. It is caused by a mutation in the FMR1 gene, leading to a deficiency of the FMRP protein, which is crucial for normal brain development and function. Children with Fragile X syndrome often exhibit features such as learning disabilities, speech delays, attention deficits, and various behavioral issues, including anxiety, social difficulties, and autistic-like behaviors.

While the other conditions mentioned can also lead to challenges in development and functioning, they operate differently. Cerebral palsy primarily affects motor control and movement due to brain injury or malformation, and may not directly cause cognitive delays in every case. Huntington's disease is a neurodegenerative disorder that typically appears later in life and is less relevant to childhood developmental issues. Spina bifida is a neural tube defect that can lead to physical disabilities, but its impact on cognitive development varies widely and is not as directly associated with behavioral disorders as Fragile X syndrome. Therefore, Fragile X syndrome is the condition most closely linked with developmental delays and behavioral disorders in children.