It is a well-known fact that a mother’s eating habits during pregnancy can have an effect on the functioning of the baby’s immune cells.
A double-blind randomised placebo-controlled research in which almost 1000 women took part, showed that babies whose mothers took 400 mg of the indispensable docosahexaenoic acid DHA daily during pregnancy, caught a cough 26% less often and rhinitis 20% less often than other babies. The babies that did fall ill showed far less severe symptoms, and also the illness lasted a shorter period of time.
Research publication: Imhoff-Kunsch B et al. Prenatal docosahexaenoic acid supplementation and infant morbidity: randomized controlled trial. Pediatrics. 2011 Sep;128(3).