["Journal of Intellectual Disability Research, EarlyView. ", "\nABSTRACT\n\nBackground\nThis study examined the experiences of infants diagnosed with fragile X syndrome (FXS) in the newborn period and their caregivers during the infant's first year of life. The primary objective was to understand caregiver concerns and access to early intervention services for infants diagnosed with FXS presymptomatically.\n\n\nMethods\nParticipants for this study were part of a pilot intervention programme for newborns with FXS and their caregivers. A mixed‐methods approach was taken combining data from caregiver questionnaires as well as intervention session notes to identify caregiver concerns and early intervention services.\n\n\nResults\nCaregivers of infants with FXS consistently reported concerns in motor development in the first few months of life with increasing concern regarding communication development closer to 12 months of age. Despite all being eligible based on having an established condition and instruction for accessing early intervention services provided by the intervention team, only half of participants were enrolled in their state's Part C programme by the child's first birthday. Occupational therapy was the most accessed service (33% of infants), followed by physical therapy (27%), feeding therapy (20%), speech therapy (13%) and developmental play therapy (7%).\n\n\nConclusions\nAlthough one of the main benefits of earlier diagnosis is purported to be earlier access to interventions, we found infants diagnosed with FXS prior to emergence of symptoms experienced barriers to accessing early intervention services, despite FXS being an established condition for Part C services. These findings highlight the need for further exploration of the referral process for infants diagnosed with neurogenetic conditions in infancy.\n\n"]