title: Vitamin D deficiency during pregnancy: an ongoing epidemic.
authors.forename: Bruce W
authors.initials: BW
authors.lastname: Hollis
authors.forename: Carol L
authors.initials: CL
authors.lastname: Wagner
mesh_terms: D015415:Biomarkers / Q000097:blood; D005260:Female; D006801:Humans; D011247:Pregnancy; D011248:Pregnancy Complications / Q000453:epidemiology*; D012880:Skin Pigmentation / Q000502:physiology*; D014807:Vitamin D / Q000031:analogs & derivatives* / Q000097:blood; D014808:Vitamin D Deficiency / Q000150:complications / Q000453:epidemiology*
chemical_list: D015415:Biomarkers; D014807:Vitamin D; C104450:25-hydroxyvitamin D