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sFGR is when one baby is very small, but the other is (often) growing normally. This can occur in identical or non-identical twins, and the cause for this differs between the two types. The smaller twin has a risk of stillbirth if it remains very malnourished, which can have an impact on the other twin (in identical twins), or lead to very early labour. Extensive research has tried to identify the risks involved to the babies, how to diagnose this condition, what treatments are available, and when the best time would be to deliver the babies.

At St George’s, we have developed criteria for accurately diagnosing sFGR, looked into the natural history and outcomes of twins with sFGR depending on diagnostic criteria used, and established a core set of outcomes to be reported in research for babies following sFGR so that we can compare and improve the value of future research.

Consensus Definition and Essential Reporting Parameters of Selective Fetal Growth Restriction in Twin Pregnancy: A Delphi Procedure

Early- And Late-Onset Selective Fetal Growth Restriction in Monochorionic Diamniotic Twin Pregnancy: Natural History and Diagnostic Criteria

Core Outcome Set for Studies Investigating Management of Selective Fetal Growth Restriction in Twins

Twin Pregnancy Complicated by Selective Growth Restriction

Prediction of Adverse Pregnancy Outcome in Monochorionic Diamniotic Twin Pregnancy Complicated by Selective Fetal Growth Restriction