What to watch with Omega-3 Index and fertility?

The Omega-3 Index (percentage of EPA and DHA in red blood cells) is associated with fertility outcomes in both women and men. Observational studies and some randomized trials suggest that a higher index may improve egg quality, sperm motility and morphology, and implantation success. However, the evidence is moderate – not all studies show consistent benefits, and effect sizes are often small. The index is a biomarker, not a diagnostic tool. High intakes (>3 g/day combined EPA+DHA) may increase bleeding risk, especially in combination with anticoagulants. The balance with omega-6 fatty acids also matters. A consumer test like MyBody-X Omega-3 Index can provide a snapshot, but results should be interpreted with a healthcare professional. Caveat: marketing often overstates the link; supplementation alone does not guarantee improved fertility. Strongest evidence exists for DHA during pregnancy, less for conception. For optimization, focus on sustainable sources (algae oil, low-mercury fish) and monitor inflammatory markers. Overall, the Omega-3 Index is a useful piece of the fertility puzzle, but not a standalone solution.