title: Effect of vitamin A supplementation of plasma progesterone levels in pregnancy.
mesh_terms: D002986:Clinical Trials as Topic; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D011247:Pregnancy; D011374:Progesterone / Q000097:blood*; D012709:Serum Albumin / Q000032:analysis; D014801:Vitamin A / Q000494:pharmacology*
chemical_list: D012709:Serum Albumin; D014801:Vitamin A; D011374:Progesterone