A nurse is caring for a client who is 5 hr postpartum following a vaginal birth of a newborn weighing 11 lb 6 oz. (5160 g). The nurse should recognize that this client is at risk for which of the following postpartum complications?

Choice A reason: Erythroblastosis fetalis is the correct answer, as it is a hemolytic disease of the newborn that occurs when the mother is Rh-negative and the newborn is Rh-positive, and the maternal antibodies cross the placenta and destroy the newborn's red blood cells, causing anemia, jaundice, and edema. Rh0 (D) immunoglobulin is an injection that prevents the formation of Rh-positive antibodies in the mother, and reduces the risk of erythroblastosis fetalis in the current or subsequent pregnancies.

Choice B reason: Hypobilirubinemia is not the correct answer, as it is a low level of bilirubin in the blood that can cause pale skin, poor feeding, or lethargy. Hypobilirubinemia is not related to the Rh factor or the Rh0 (D) immunoglobulin injection, and it is not a common or serious complication in the newborn.

Choice C reason: Biliary atresia is not the correct answer, as it is a congenital defect of the bile ducts that prevents the flow of bile from the liver to the intestine, causing jaundice, dark urine, and clay-colored stools. Biliary atresia is not related to the Rh factor or the Rh0 (D) immunoglobulin injection, and it is not a preventable complication in the newborn.

Choice D reason: Transient clotting difficulties is not the correct answer, as it is a bleeding disorder that occurs due to the deficiency of vitamin K, which is essential for the synthesis of clotting factors. Transient clotting difficulties is not related to the Rh factor or the Rh0 (D) immunoglobulin injection, and it is preventable by administering vitamin K to the newborn.

Choice A reason: This action is the first and most important intervention that the nurse should perform, as it can prevent or reduce the compression of the umbilical cord, which can cause fetal hypoxia, bradycardia, or death. The nurse should insert a gloved hand into the vagina and gently push the presenting part away from the cord, and maintain this position until the delivery.

Choice B reason: This action is not the first intervention that the nurse should perform, as it does not address the cause of the cord prolapse, which is the displacement of the cord below the presenting part. However, this action is helpful to prevent the drying and infection of the cord, and should be done after the first intervention.

Choice C reason: This action is not the first intervention that the nurse should perform, as it may not be effective or feasible depending on the stage of labor and the client's condition. However, this action is beneficial to reduce the pressure of the presenting part on the cord, and should be done after the first intervention.

Choice D reason: This action is not the first intervention that the nurse should perform, as it does not provide immediate relief or protection to the fetus. However, this action is necessary to expedite the delivery and prevent further complications, and should be done after the first intervention.