Formulas & normal valuesFree in the app
Liquor volume
AFI and deepest vertical pocket.
Source: StatPearls · SMFMMeasure
| AFI normal | 5–25 cm (sum of 4 quadrants). |
|---|---|
| DVP normal | 2–8 cm (pocket ≥1 cm wide). |
| Oligohydramnios | DVP <2 cm or AFI <5 cm. |
| Polyhydramnios | DVP ≥8 cm or AFI >24–25 cm. |
Deepest vertical pocket is preferred — leads to fewer unnecessary interventions.
A summary for trained clinicians. Always check the full guideline, the patient in front of you and your hospital's protocol. Spotted an error? Tell us.