selective intrauterine growth restriction
Also written as: sIUGR — selective intrauterine growth restriction
Growth restriction affecting only one twin in a monochorionic pregnancy due to unequal placental sharing.
Full Definition
A condition specific to monochorionic twin pregnancies where one twin experiences growth restriction while the co-twin grows normally, typically due to unequal sharing of the single placenta. The growth-restricted twin may have reduced amniotic fluid and abnormal Doppler studies, while the normally grown twin may develop polyhydramnios. This condition can progress to twin-twin transfusion syndrome or may require selective reduction if severe. Management involves frequent monitoring with ultrasound and Doppler studies, with delivery timing based on the severity of growth restriction and fetal well-being parameters.
Usage
Usage note: Always specify 'selective' to distinguish from general IUGR affecting both twins in multiple pregnancies.
In Context
- "Selective intrauterine growth restriction was diagnosed at 24 weeks in the smaller twin." — Ultrasound report
- "sIUGR monitoring requires assessment of both amniotic fluid volumes and umbilical artery Dopplers." — Clinical protocol