| A rare disorder related to monochorionic twin pregnancy with characteristics of unequal placental sharing leading to growth restriction in one twin according to the following criteria: estimated fetal weight (EFW) of one twin below the 3rd percentile as a solitary parameter, or fulfilment of at least two out of four contributory parameters (EFW of one twin below the 10th percentile, abdominal circumference of one twin below the 10th percentile, EFW discordance of ≥ 25%, umbilical artery pulsatility index of the smaller twin above the 95th percentile). Early severe forms are associated with a significant risk of intrauterine demise or neurological adverse outcome for both twins. |
