Evidence-based medicine experts have called for urgent review of gestational diabetes diagnosis criteria after a randomised trial found one-step screening holds no health benefits for mothers or babies.

In fact, the findings validate concerns that up to 25% of pregnant women and their infants may be at greater risk of harm with the use of a lower fasting glucose cut-off of 5.1mmol/L, say Brisbane GP and researcher Professor Jenny Doust, from the University of Queensland, and colleagues.