Forensic evaluation in alleged sibling incest against children.

Sibling incest is a serious form of intrafamilial sexual abuse with health, social, and legal relevance. A retrospective study was conducted through the analysis of forensic medical reports of the alleged sibling incest of victims under 18 years old (n = 68) from 2004 to 2011 as well as the respective judicial outcomes. Results demonstrated that sibling's sexual abuse is associated with several circumstances that might exacerbate its severity such as vaginal, anal, and/or oral penetration. Moreover, the victim's young age, the proximity between victim and abuser, and the fact that it is committed at the victim's and/or abuser's home and by using physical violence and verbal threats justify a late detection of these cases.