Measurement technique	Oligohydramnios	Normal	Polyhydramnios
Amniotic fluid index	0 to 5 cm	5.1 to 25 cm	> 25 cm
Single deepest pocket	0 to 2 cm	2.1 to 8 cm	> 8 cm
Two-diameter pocket	0 to 15 cm	15.1 to 50 cm	> 50 cm