Selective fetal growth restriction (sFGR) occurs in about 10% to 15% of monochorionic twins with a high incidence of intrauterine fetal death and low gestational age at birth. sFGR is associated with multisystem adverse prognosis, including brain injury, myocardial hypertrophy, right ventricular outflow tract obstruction, intestinal perforation, and abnormal insulin secretion. sFGR can be classified into three types based on the umbilical artery Doppler waveforms under ultrasound. The clinical characteristics and prognosis vary with the different types. There are few reported studies on the sFGR population, and comprehensive, long-term follow-up is needed.

Fetal growth restriction; Diseases in twins; Twins, monozygotic; Prognosis