Definition of iron deficiency in healthy pregnancy is based on the general population cutoffs and is usually defined as ferritin levels <30 μg/l and low transferrin saturation (TSAT) <20%; however, research on pregnancy-specific thresholds of serum ferritin concentrations across gestation is lacking.59, 60, 61 Anemia and iron deficiency during pregnancy are generally managed by oral or i.v. iron. Here, TF is linked to Iron deficiency anemia.