Once Versus Twice Daily Iron Supplementation in Pregnant Women

Inclusion Criteria: * Singleton gestation * Iron deficiency anemia as defined by a Hgb of less than 11mg/dL in the first and 3rd trimester and 10.5mg/dL in the 2nd trimester and a serum ferritin of less than 15ug/mL. * In accordance with American College of Obstetricians and Gynecologists (ACOG) guidelines, the Hgb cutoff will be reduced by 0.8mg/dL in African American women. * In accordance with the standard of care, African American women and those with a mean corpuscular volume (MCV) on their routine screening complete blood count (CBC) of less than 70 will require a hemoglobin electrophoresis to exclude hemoglobinopathy prior to enrollment. Exclusion Criteria: * Multiple gestation * Maternal hemoglobinopathy or hemochromatosis, * Irritable bowel disease or irritable bowel syndrome * History of bariatric surgery or extensive bowel surgery * Individuals already receiving iron supplementation aside from prenatal vitamins.