The incidence of twin pregnancy is rising, due mainly to advanced maternal age and resultant widespread use of assisted reproductive techniques. It is associated with a high risk of perinatal mortality and morbidity, particularly in monochorionic pregnancy, with complications such as selective fetal growth restriction and twin–twin transfusion syndrome contributing to this risk. This new Virtual Issue from Ultrasound in Obstetrics & Gynecology presents a selection of recent papers reporting on screening, management and prevention of preterm birth in twin pregnancy. These papers are FREE to read for a limited period.
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