Yes pervasive developmental disorder genetic. Try to keep away from it it is a very bad disorder.

The #1 complication of Pervasive developmental disorder is that people with it have trouble making friends because they can't relate to other people, and don't have very much social skills.

PDD is an acronym for pervasive developmental disability, which is a description of a type of developmental disorder. It means the same as autism spectrum disorder. It encompasses five conditions: autism, Asperger's Syndrome, Rett Syndrome, childhood disintegrative disorder, and PDD-Not Otherwise Specified. See the related question below "What are autism spectrum disorders?" for more details.

Rule out means that the doctor has examined/assessed/interviewd the patient, evaluated all the diagnositic studies and ruled out everything related to the patients complaints and findings. The doctor has done this; so he (ruled out) R/O Pervasive Developmental Disorder-NOS.

Pervasive Developmental Disorders,or PDD, are a range of disorders in which young children display delays in skills, especially social skills. Autism falls into this category, as does Asperger's syndrome and Rett's syndrome.