Table 1.

Quintero Staging System

Stage	Polyhydramnios/Oligohydramnios	Visualization of Donor Bladder	Discrepancy of Umbilical Cords as Measured by Doppler	Fetal Hydrops	Fetal Demise
I	Yes	Yes	No	No	No
II	Yes	No	No	No	No
III	Yes	No	Yes	No	No
IV	Yes	No	Yes	Yes	No
V	Yes	No	Yes	Yes	Yes