AVP and Anxiety: Study did not find any differences between the levels of OT and vasopressin in their sample of 75 patients with ASD compared to age‐matched controls in a United States population.Higher OT values were associated with greater anxiety in all girls. Higher OT values were also found to be associated with better pragmatic language in both boys and girls. AVP levels were positively associated with restricted & repetitive behaviors in girls with ASD. AVP levels were negatively (non‐significantly) associated with these behaviors in boys with ASD.