Objective To study the awareness of birth defects prevention knowledge among 0-6 years old children's parents,in order to provide reference for health education strategies about birth defects prevention.Methods Uniform designed epidemiologic questionnaire of prevention knowledge about birth defects was adopted.Convenience samplingand cluster random sampling method was employed for medical and health institutions and kindergarten class as unit,respectively.A total of 5 147 cases were identified.Results Aware...