 [ Symptoms ] my daughter is 27 no ovaries she has her uterus is it safe for my 14 year old daughter to saftely be an egg donor   what risk are there for children  what concerns or cautions should i have for my 14 year ol daugter [ Disease ] normal blood vitamin b12 levels are between 200 835 picograms per milliliter  pgml for more on blood levels see this article and for food sources and recommended daily allowances see this one