TOPLINE:

New customised growth charts for twins (GROW-T), adjusted for maternal characteristics, more accurately predicted a small-for-gestational age (SGA)-associated risk for adverse perinatal outcomes than charts for singletons (GROW-S).

METHODOLOGY:

Researchers developed customised growth charts for twin pregnancies and compared them with singleton charts to evaluate their ability to identify SGA twins who are at an increased risk for adverse perinatal outcomes.

They evaluated 8457 twin pregnancies (16,914 foetuses) from 127 NHS hospitals in the UK from January 2015 to February 2025, representing approximately two thirds of all NHS units.

A mixed-effects linear regression analysis was performed to determine pregnancy-specific optimal weights at 37 weeks.

Researchers compared GROW

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