Essential fatty acids like DHA and GLA play important roles in pregnancy. DHA is important for fetal brain and eye development. Studies show that DHA supplementation in pregnancy increases birth weight and gestation duration, and may reduce the risk of preeclampsia. GLA supplementation may help prevent pregnancy-induced hypertension by increasing production of vasodilatory prostaglandins. International organizations recommend 300 mg of DHA and 150-300 mg of GLA daily during pregnancy.