| OASI | Old Age and Survivors Insurance |
|---|---|
| SGA | small for gestational age |
| TAM | tamoxifen; teen-age mother; thermoacidurans agar modified; time-averaged mean; total active motion; ... |
| Y/A | years of age |
| DGA | days gestational age |
|---|---|
| MA | menstrual age |
| PNA | post-natal age |
| SGA | small for gestational age infant |