| parent | OB.US | LP7830-5 |
| child | Perimeter | Fetus | OB ultrasound | LP416302-0 |
| child | Perimeter | Fetus | Head | OB ultrasound | LP416303-8 |
| child | Perimeter | Fetus | Heart | OB ultrasound | LP416304-6 |
| child | Perimeter | Fetus | Thorax | OB ultrasound | LP416305-3 |
| STATUS | ACTIVE |
| PartDisplayName | en-US | Perimeter |
| DisplayName | en-US | Perimeter |
LOINC Version: 2.78