A nurse is caring for a client who is at 22 weeks of gestation and has been unable to control her gestational diabetes mellitus with diet and exercise. The nurse should anticipate a prescription from the provider for which of the following medications for the client?

Choice A reason: This statement is correct, as the ultrasound can help diagnose placenta previa, which is a condition where the placenta covers the cervical opening and can cause painless, bright red bleeding in the third trimester. Placenta previa is a serious complication that can affect the delivery and the fetal oxygenation.

Choice B reason: This statement is incorrect, as the biparietal diameter is a measurement of the fetal head that is used to estimate the gestational age and the fetal growth. The biparietal diameter is not related to the cause or the severity of the bleeding.

Choice C reason: This statement is incorrect, as the fetal lung maturity is an assessment of the surfactant level in the amniotic fluid that is used to predict the risk of respiratory distress syndrome in preterm infants. The fetal lung maturity is not related to the cause or the severity of the bleeding.

Choice D reason: This statement is incorrect, as the viability of the fetus is an evaluation of the fetal heart rate, movement, and tone that is used to determine the fetal well-being and distress. The viability of the fetus is not related to the cause or the severity of the bleeding, although it can be affected by it.

Choice A reason: Using fingertips when calming the newborn is not recommended, as it can overstimulate the immature nervous system and cause stress. Instead, the nurse should use gentle, firm, and sustained touch, such as cupping the head and feet, or swaddling the newborn.

Choice B reason: Positioning the premature infant on their abdomen is contraindicated, as it can increase the risk of sudden infant death syndrome (SIDS). The nurse should position the newborn on their back or side, with a rolled blanket or towel to support the spine and prevent flattening of the head.

Choice C reason: Keeping the newborn in a well-lit nursery is not advisable, as it can interfere with the development of the circadian rhythm and sleep patterns. The nurse should provide a dark and quiet environment for the newborn, and expose them to natural light during the day.

Choice D reason: Clustering the newborn's care activities is beneficial, as it can reduce the number of disruptions and allow for longer periods of rest and growth. The nurse should plan and coordinate the care activities, such as feeding, bathing, changing, and assessing, to minimize the stress on the newborn.