A nurse in a prenatal clinic is teaching a client who is in her second trimester and has a new diagnosis of gestational diabetes. Which of the following statements by the client indicates a need for further teaching?

Choice A reason: Physiological jaundice is not the correct answer, as it is a normal and benign condition that occurs in about 60% of term newborns, and usually appears after the first 24 hours of life. Physiological jaundice is caused by the breakdown of fetal hemoglobin and the immature liver function, and resolves within a few days.

Choice B reason: Maternal cocaine abuse is not the correct answer, as it is a maternal risk factor that can cause various complications in the newborn, such as low birth weight, prematurity, intrauterine growth restriction, or congenital anomalies. Maternal cocaine abuse does not cause jaundice in the newborn, unless it leads to hepatic or renal dysfunction.

Choice C reason: Maternal/newborn blood group incompatibility is the correct answer, as it is a maternal-fetal condition that can cause hemolytic disease of the newborn, which is a severe form of jaundice that can appear within the first 24 hours of life. Maternal/newborn blood group incompatibility occurs when the mother's blood type is Rh negative and the newborn's blood type is Rh positive, or when the mother's blood type is O and the newborn's blood type is A or B. The maternal antibodies cross the placenta and attack the newborn's red blood cells, causing hemolysis, anemia, and hyperbilirubinemia.

Choice D reason: Absence of vitamin K is not the correct answer, as it is a nutritional deficiency that can cause hemorrhagic disease of the newborn, which is a bleeding disorder that can occur within the first week of life. Absence of vitamin K is due to the lack of intestinal flora and the low vitamin K content in breast milk, and can cause bleeding in the skin, mucous membranes, or internal organs. Absence of vitamin K does not cause jaundice in the newborn, unless it leads to hepatic or biliary dysfunction.

Choice A reason: Asymmetric thigh folds is a common finding in newborns who have DDH, because the affected hip is dislocated or subluxated, causing the thigh to appear shorter and the skin folds to be uneven. The nurse should compare the number and depth of the skin folds on both sides of the groin and buttocks.

Choice B reason: Absent plantar reflexes is not a typical finding in newborns who have DDH, because it is not related to the hip joint. The plantar reflex is a normal reflex that causes the toes to curl when the sole of the foot is stroked. The nurse should assess the plantar reflex in all newborns, regardless of their hip status.

Choice C reason: Lengthened thigh on the affected side is not a usual finding in newborns who have DDH, because the opposite is true. The affected thigh is usually shorter than the unaffected thigh, due to the displacement of the femoral head from the acetabulum. The nurse should measure the length of both thighs from the anterior superior iliac spine to the medial malleolus.

Choice D reason: Inwardly turned foot on the affected side is not a specific finding in newborns who have DDH, because it can be caused by other conditions, such as metatarsus adductus or clubfoot. The inward turning of the foot is not a direct result of the hip disorder, but rather a secondary effect of the abnormal positioning of the leg. The nurse should examine the alignment and mobility of the foot and ankle.