DHA During Pregnancy: What Your Baby's Brain Is Building
Your baby's brain needs DHA most in the third trimester. Most mothers aren't getting enough.
The human brain is approximately 60% fat by dry weight — and the most abundant fatty acid in brain tissue is DHA (docosahexaenoic acid). During the third trimester, your baby accumulates DHA at a rate of approximately 50–70mg per day, building the neural architecture that will support cognition, vision, and emotional regulation for the rest of their life.
Where DHA Comes From
DHA is an omega-3 fatty acid found primarily in fatty fish (salmon, sardines, mackerel) and algae. The body can theoretically synthesise it from ALA (found in flaxseeds, walnuts), but the conversion rate is extremely low — typically less than 5% in women, even lower in men.
How Much Do You Need?
The WHO recommends a minimum of 200mg DHA per day during pregnancy. The European Food Safety Authority recommends 200–300mg. Most dietary surveys suggest that pregnant Egyptian women consume well below this threshold, particularly those who eat fish infrequently.
DHA supplementation during pregnancy has been linked in multiple studies to higher cognitive scores in children at 18 months, better visual acuity, and reduced risk of preterm birth.
Choosing the Right Supplement
- Look for a supplement that specifies DHA content (not just total omega-3)
- Marine-sourced DHA is more bioavailable than plant-sourced ALA
- Molecularly distilled products remove heavy metals and PCBs from fish oil
- Softgel form is better absorbed than liquid in most cases
Tip: DHA supplementation should continue during breastfeeding — your baby continues to receive DHA through breast milk and needs approximately 100mg/day for the first six months.