Vitamin B12 serum level and pregnancy.
D001769:Blood; D005260:Female; D005312:Fetal Blood; D005333:Fetus / Q000097:blood*; D006801:Humans; D011247:Pregnancy / Q000097:blood; D014805:Vitamin B 12 / Q000097:blood*; D014803:Vitamin B Complex
D014803:Vitamin B Complex; D014805:Vitamin B 12
BLOOD; FETUS/blood in; PREGNANCY/blood in; VITAMIN B12/in blood