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A 37-year-old G1P1001 delivers a male infant at 9 pounds 6 ounces after a C-section for preeclampsia with severe features. The mother has a history of type II diabetes with a hemoglobin A1c of 12.8% at her first obstetric visit. Before this pregnancy, she was taking metformin, and during this pregnancy, she was started on insulin. At her routine visits, her glucose logs frequently showed fasting fingerstick glucoses above 120 mg/dL and postprandial values above 180 mg/dL. In addition, her routine third trimester culture for group B Streptococcus was positive. At 38 weeks and 4 days gestation, she was found to have a blood pressure of 176/103 mmHg and reported a severe headache during a routine obstetric visit. She denied rupture of membranes or vaginal bleeding. Her physician sent her to the obstetric triage unit, and after failure of several intravenous doses of labetalol to lower her blood pressure and relieve her headache, a C-section was performed without complication. Fetal heart rate tracing had been reassuring throughout her admission. Apgar scores at 1 and 5 minutes were 7 and 10. After one hour, the infant is found to be jittery; the infant's temperature is 96.1°F (35.6°C), blood pressure is 80/50 mmHg, pulse is 110/min, and respirations are 60/min. When the first feeding is attempted, he does not latch and begins to shake his arms and legs. After 20 seconds, the episode ends and the infant becomes lethargic. Which of the following is the most likely cause of this infant’s presentation?
Transplacental action of maternal insulin
Inborn error of metabolism
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