• Veeranki SP, Gebretsadik T, Mitchel EF, Tylavsky FA, Hartert TV, Cooper WO, Dupont WD, Dorris SL, Hartman TJ, Carroll KN. Maternal Folic Acid Supplementation During Pregnancy and Early Childhood Asthma. Epidemiology (Cambridge, Mass.). 2015 Sep 10. PMID: 26360371 [PubMed].

Abstract 

Asthma is one of the most common chronic childhood diseases. While folic acid supplementation around conception helps prevent neural tube defects, an animal model suggests that it may be a risk factor for respiratory diseases, although epidemiologic studies have had conflicting results. We investigated the timing of folic acid-containing prescription filling during pregnancy and child asthma.