The mother asks the nurse why her child's hemoglobin was normal at birth but now the child has S hemoglobin. Which of the following responses by the nurse is appropriate? 1. “The placenta bars passage...

The mother asks the nurse why her child's hemoglobin was normal at birth but now the child has S hemoglobin. Which of the following responses by the nurse is appropriate?

1. “The placenta bars passage of the hemoglobin S from the mother to the fetus.”

2. “The red bone marrow does not begin to produce hemoglobin S until several months after birth.”

3. “Antibodies transmitted from you to the fetus provide the newborn with temporary immunity.”

4. “The newborn has a high concentration of fetal hemoglobin in the blood for some time after birth.” The Client with Iron Deficiency Anemia