Big Baby Trial: What It Means for You
Big Baby Trial: What It Means for You if You’ve Been Told Your Baby Might Be Large
Being told your baby is “big” can feel worrying. You might start hearing about risks like shoulder dystocia (when the baby’s shoulders get stuck during birth) or being offered an induction before your due date.
A new UK study, called the Big Baby Trial, looked at whether inducing labour a little earlier (around 38 weeks) could make birth safer for babies suspected to be large.
What the Trial Found
Induction did not make a big difference overall. The trial found only a small reduction in shoulder dystocia (when shoulders get stuck).
Most babies thought to be ‘big’ weren’t actually large at birth. Ultrasounds aren’t perfect at predicting size. Actually only 40% ended up >90th percentile.
There were no clear improvements in other outcomes like NICU admissions.
The researchers themselves admitted the results weren’t strong enough to recommend early induction for everyone.
What This Means for Parents
If you’ve been told your baby is measuring big:
It doesn’t always mean your baby will be large at birth. (mostly likely they wont be!)
Early induction may slightly reduce one specific risk, but it isn’t a guaranteed “safer” choice.
Induction comes with its own challenges — longer labour, stronger contractions, and a higher chance of intervention.
So, What Should You Do?
This is where personalised decision-making matters. You deserve space to ask:
How accurate is my growth scan?
What are the real risks for me and my baby?
Do the benefits of induction outweigh the downsides in my situation?
Where to Get Support
If you want to talk this through Mobile Midwives is here for you, we can navigate this decision together—with clarity, confidence, and gentle support.
Here is a link to the original article for you:
https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(25)00162-X/fulltext
