title: The cause of the fall in serum folate in normal pregnancy.
abstract: Study of a complete antenatal population, a group of normal primigravid singleton pregnancies, and a group of normal twin pregnancies, suggests that the fall in the serum folate concentration which occurs in normal pregnancy is due principally to plasma volume expansion and should therefore be regarded as physiological.
mesh_terms: D000328:Adult; D005260:Female; D005492:Folic Acid / Q000097:blood*; D005494:Folic Acid Deficiency / Q000453:epidemiology; D006801:Humans; D010298:Parity; D010953:Plasma Volume; D049590:Postpartum Period; D011247:Pregnancy; D011263:Pregnancy Trimester, Third; D011272:Pregnancy, Multiple; D012907:Smoking; D012923:Social Class; D014427:Twins
chemical_list: D005492:Folic Acid