Pregnant patients in the UT Medical Branch outpatient obstetric clinic are screened for anemia via blood draw at first prenatal visit. Those who meet Center for Disease Control (CDC) criteria for anemia during pregnancy (hemoglobin less than 11g/dL in first and third trimesters and hemoglobin less than 10.5g/dL during the second trimester), will be approached for participation in this study. It is the protocol of the UT Medical Branch outpatient obstetric clinic to repeat a blood draw every 4 weeks in patients with anemia. At the time of their blood draw, patients who participate in our study will have the Masimo Spot Non-invasive Hemoglobin monitor placed on our finger. The primary aim of the study is to see how accurate the non-invasive monitor is compared with blood draw. With the potential benefit being earlier diagnosis of anemia and easier method to ensure improvement in the hemoglobin.