title: Vitamin D study. 'improves muscle strength'.
mesh_terms: D005260:Female; D005333:Fetus / Q000502:physiology*; D006801:Humans; D008431:Maternal-Fetal Exchange; D053580:Muscle Strength / Q000187:drug effects / Q000502:physiology*; D011247:Pregnancy; D011295:Prenatal Care / Q000379:methods; D014807:Vitamin D / Q000008:administration & dosage*; D014808:Vitamin D Deficiency / Q000517:prevention & control
chemical_list: D014807:Vitamin D