A pregnant woman initiated prenatal care at 12 weeks’ gestation. At that time, her hemoglobin and hematocrit were 13 gm/dL and 36%, respectively. Review her following prenatal labs at 28 weeks’ gestation: Hgb: 10.5 gm/dL Hct: 32% Blood type: B GBS: Positive Based on this data, what is the appropriate nursing action?