Management of Anemia in Pregnancy

Diagnostic Confirmation and Initial Assessment

A hemoglobin level of 9.5 g/dL in pregnancy is considered anemic, with normal cutoffs being >11 g/dL in the first and third trimesters and >10.5 g/dL in the second trimester, according to the Centers for Disease Control and Prevention 1
Ferritin levels should be checked to confirm iron deficiency as the underlying cause, with ferritin <45 ng/mL and low hemoglobin confirming iron deficiency anemia, as recommended by the American Gastroenterological Association 2
A complete blood count with MCV and RDW should be obtained to characterize the anemia, as suggested by the Centers for Disease Control and Prevention 1

The Centers for Disease Control and Prevention recommends prescribing 60-120 mg of elemental iron daily as first-line treatment for anemia in pregnancy 1
Patients should be counseled on consuming iron-rich foods and foods that enhance iron absorption, such as vitamin C-containing foods, as advised by the Centers for Disease Control and Prevention 1
Treatment should continue until hemoglobin normalizes for gestational age, then reduced to a maintenance dose of 30 mg/day, according to the Centers for Disease Control and Prevention 1

Hemoglobin should be reassessed after 4 weeks of treatment, with an expected response of at least a 1 g/dL increase in hemoglobin or a 3% increase in hematocrit, as recommended by the Centers for Disease Control and Prevention 1
If there is no response after 4 weeks despite compliance and absence of acute illness, further evaluation with MCV, RDW, and serum ferritin is necessary, as suggested by the Centers for Disease Control and Prevention 1

Referral to a physician familiar with anemia in pregnancy is recommended if hemoglobin is <9.0 g/dL or hematocrit <27.0% for further medical evaluation, as advised by the Centers for Disease Control and Prevention 1

In women of African, Mediterranean, or Southeast Asian ancestry, mild anemia unresponsive to iron therapy may indicate thalassemia minor or sickle cell trait, as noted by the Centers for Disease Control and Prevention 1

Transfusion is not indicated at hemoglobin 9.5 g/dL in a stable pregnant patient, according to the European Society of Intensive Care Medicine 3
Prophylactic transfusion during pregnancy for patients with sickle cell disease remains controversial, with conditional recommendations based on very low certainty evidence, as stated by the American Society of Hematology 4