The impact of sexual abuse on female development: a longitudinal study
I find this to be the most telling stat:"In a few cases (N So roughly 5% (<5 of 84) of the control group were discovered to have themselves been abused and needed to be dropped from the study.  I was once in a law lecture on medical ethics.  We were discussing genetic testing of newborns and how this could detect incest/abuse.  A medical doctor in the class was dead against such testing.  In his experience, amongst pregnant teenagers (17 and younger) about 10% were pregnant by their own fathers/brothers.  His opinion was that our society is not ready to deal with this, that such abuse is far more common than anyone is willing to admit.  He actually said: You better build some more prisons before you start testing babies for this.  The OP study seems in line with his numbers.