BackgroundThere is a growing interest in exploring parents' views on the benefits of early diagnosis and awareness of sex chromosome trisomies. However, only a few studies focus specifically on the experience of parents of children with XYY syndrome. The present study aimed to assess, in parents of individuals with XYY, the perceived severity of their children's condition, their level of satisfaction with the disclosure process and their concerns about their children's present and future condition.MethodsA national online sample of 56 Italian parents of children and young adults diagnosed with XYY syndrome participated in the study. They filled out a specifically developed online survey that assessed their children's areas of concern, their experience with the disclosure process and their worries about their children's condition.ResultsSeventy per cent of the parents received a prenatal diagnosis, whereas 30% received a postnatal diagnosis. High individual variability was found in the parent report of their child's condition. The most frequent areas of concern were attention regulation, emotion control and behaviour control. Individuals with a postnatal diagnosis showed more severe profiles. Parents were generally dissatisfied with the disclosure process, with no differences between prenatal and postnatal disclosure. However, more than 50% of the parents who received a prenatal disclosure reported that their child's condition was less severe than they had expected. In contrast, only 11% of the parents with postnatal disclosure reported this situation. Parents' concerns were negatively related to global satisfaction with the disclosure process and the correspondence between current and expected conditions but positively associated with the child's severity level.ConclusionsThe results suggest that clear and realistic information during the disclosure process to parents is needed in both prenatal and postnatal communication and may alleviate parents' concerns.