When you do change your diet based on your test results, it is important to re-test to make sure the changes you made actually impacted your blood level. We recommend re-testing every 2-3 months during pregnancy. In many of the studies we’ve seen where women only started supplementing in their second trimester, it was still enough to have an impact on gestational length and preterm birth. So even if you didn’t take DHA in the first trimester, it’s not too late to start taking it even into the third trimester. It all counts!
Here is a helpful video.