The role of factors associated with the course of pregnancy and childbirth in attention deficit hyperactivity disorder (ADHD).

Objectives: Assessment of the prevalence of risk factors associated with the course of pregnancy and childbirth and the condition of the child after birth in agroup of children and adolescents with ADHD and a control group.

Methods: 205 unrelated children and adolescents diagnosed with ADHD and 106 primary and secondary school students aged 7-17. Method.

[Obsessive-compulsive symptoms, tics, stereotypic movements or need for absolute consistency? The occurrence of repetitive activities in patients with pervasive developmental disorders--case studies].

Repetitive and stereotyped behaviours in the form of stereotyped interests or specific routine activities are one ofthe diagnostic criteria in pervasive developmental disorders. The occurrence of repetitive behaviours in patients with pervasive developmental disorders is a starting point for questions about the type and classification criteria of such behaviours. The aim of the article is to present case studies of patients with pervasive developmental disorders and co-morbid symptoms in the form of routine activities, tics, obsessive-compulsive symptoms or stereotyped behaviours.