Arranged in subseries:
- ROH/A.1-ROH/A.8 Tissue Typing
- ROH/A.9-ROH/A.21 Genetic Registers
- ROH/A.22-ROH/A.36 Regional Genetic Service
- ROH/A.37-ROH/A.40 Amniocentesis
- ROH/A.41-ROH/A.61 ‘Vitamins and neural tube defects’
- ROH/A.62-ROH/A.88 Special Medical Developments (‘SMDs’)
- ROH/A.89-ROH/A.97 Group for the Study of Human Genetics