| Abbreviations | Meaning |
 | NHS-2 | Second Natural History Study [of Congenital Heart Defects] |
| CLD | Congenital Limb Deficiency |
| CCHS | Congenital Central Hypoventilation Syndrome; Copenhagen City Heart Study |
| CHD | Congenital Heart Disease |
| CSNB | Congenital Stationary Night Blindness |
| CAH | Congenital Adrenal Hyperplasia |
| CSNA | Congenital Sensory Neuropathy With Anhidrosis [syndrome] |
| CDH | Congenital Dislocation Of The Hip |
| CCHD | Caephilly Collaborative Heart Disease [study]; Cyanotic Congenital Heart Disease |
| CONGHD | Congenital Heart Disease |
| CNSHA | Congenital Nonspherocytic Hemolytic Anemia |
| NCRSP | National Congenital Rubella Surveillance Programme [UK] |
| CSB | Congenital Short Bowel |
| CASMD | Congenital Atonic Sclerotic Muscular Dystrophy |
| ACED | Anhidrotic Congenital Ectodermal Dysplasia |
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