A patient with no prenatal care is admitted to the labor and delivery unit.She is placed on an external fetal monitor, and an intravenous infusion is begun.
A tentative diagnosis of abruptio placentae is made.Which finding would support this diagnosis?

The correct answer is choice D. Gestational age of 35-38 weeks.

This is because preterm babies are more likely to develop jaundice due to their immature liver and increased breakdown of red blood cells.Babies born between 35 and 38 weeks are considered late preterm and have a higher risk of jaundice than full-term babies.

Choice A is wrong because African American ethnicity is not a risk factor for jaundice.In fact, Asian, European, or native American ethnicity are more associated with jaundice.

Choice B is wrong because meconium-stained amniotic fluid is not a risk factor for jaundice.

Meconium is the first stool of the baby and it may indicate fetal distress, but it does not affect the bilirubin level.

Choice C is wrong because bottle feeding is not a risk factor for jaundice.In fact, breastfeeding is more associated with jaundice due to dehydration and poor caloric intake.

Physiologic jaundice is a common condition in newborns that occurs when the baby’s blood contains an excess of bilirubin, a yellow pigment produced during the normal breakdown of red blood cells.In the womb, the mother’s liver removes bilirubin for the baby, but after birth the baby’s own liver must take over this function.Because the baby has more red blood cells than an adult and their liver is still immature, they may not be able to process all the bilirubin and it may build up in their skin and eyes, causing a yellowish appearance.

Choice A is wrong because it is not an increase in neonatal metabolism that causes physiologic jaundice, but rather a decrease in hepatic metabolism of bilirubin.

Choice C is wrong because it describes a different type of jaundice called hemolytic jaundice, which occurs when there is an incompatibility between the blood types of the mother and the baby, leading to an immune reaction that destroys the baby’s red blood cells faster than they can be replaced.

Choice D is wrong because it confuses the reticuloendothelial system with the hepatic system.

The reticuloendothelial system is a network of cells and tissues that are involved in immune responses and phagocytosis (the ingestion of foreign particles or cells).

The hepatic system is the system of organs and structures that are involved in liver functions, such as bile production and detoxification.

Normal ranges for bilirubin levels in newborns are 1 to 12 mg/dL (17 to 205 micromol/L) for total bilirubin and 0.2 to 1.4 mg/dL (3 to 24 micromol/L) for direct bilirubin.

Physiologic jaundice usually peaks at 3 to 5 days after birth and resolves by 2 weeks of age.

It does not require treatment unless the bilirubin levels are very high or rising rapidly, which may indicate a more serious condition or a risk of brain damage.