Prenatal Docosahexaenoic Acid Supplementation and Infant Morbidity: Randomized Controlled Trial.  Imhoff-Kunsch et al., 2011 [213]  Pregnant woman; a total of more of 800 infants were included in the trial.RCT  DHA (400 mg)  At 1 month: shorter duration of cough, phlegm, and wheezing, respectively (p < 0.001). At 3 months: 14% less time ill (p < 0.0001). At 6 months: shorter duration of fever, nasal secretion, difficulty breathing, rash, and “other illness,” respectively (all p < 0.05).