A recent study published in The American Journal of Clinical Nutrition examined the relationship between dietary patterns before and during pregnancy, hypertensive disorders of pregnancy (HDP), and gestational diabetes mellitus (GDM). In this study, a search was undertaken through nine databases including PubMed, Embase, and Cochrane and overall eight studies were selected for HDP and 11 for GDM. The study population primarily comprised healthy Caucasian women. Despite the presence of limited data, results suggested that dietary patterns before and during pregnancy, that are higher in vegetables, fruits, whole grains, nuts, legumes, fish, and vegetable oils and lower in meat and refined grains, are associated with reduced risk of HDP, including preeclampsia and gestational hypertension. In addition, these dietary patterns before pregnancy are associated with reduced risk of GDM.