Can Omega-3 Byproducts in the Blood Predict Preterm Birth Risk?

This review looked at whether special fat-derived molecules called oxylipins—which the body makes from omega-3 fatty acids—might help explain why low omega-3 levels during pregnancy are sometimes linked to earlier births. Oxylipins act as signaling molecules, and researchers wanted to know if measuring them could reveal how omega-3s influence pregnancy length.

The review searched for studies that both tracked omega-3 intake or status and measured oxylipins using a precise lab method (LC-MS). Out of all available research, only two studies fit these criteria, and both came from the same larger parent trials.

One of these studies found that certain oxylipins measured early in pregnancy were linked to a higher chance of spontaneous preterm birth. The other study looked at how oxylipin levels changed after omega-3 supplementation, but it did not examine whether these changes related to pregnancy length or preterm birth risk.

Overall, the authors concluded that there simply isn’t enough research yet to clearly connect omega-3 status, oxylipins, and preterm birth risk. The existing findings are interesting starting points but not strong enough to draw firm conclusions.