Serum vitamin B12 level in pregnancy.
D000740:Anemia / Q000097:blood; D005260:Female; D006801:Humans; D011247:Pregnancy; D011250:Pregnancy Complications, Hematologic / Q000097:blood; D013785:Thailand; D014805:Vitamin B 12 / Q000097:blood*
D014805:Vitamin B 12