Which maternal physiologic change is NOT expected during labor?

Which maternal physiologic change is NOT expected during labor?

• A. Increase in heart rate
• B. Increase in respiratory rate
• C. Increase in blood pressure
• D. Slight decrease in body temperature

Answer: (D)

During labor, the body activates systems to meet the increased energy and oxygen needs from uterine contractions. The heart rate rises to boost cardiac output, the respiratory rate increases to supply more oxygen and remove CO2, and blood pressure can rise in response to pain and sympathetic stimulation. Temperature, however, typically stays the same or rises slightly due to heightened metabolic activity and heat production from exertion; a decrease in body temperature would be unexpected. A slight rise in temperature can occur with labor, dehydration, or increased muscle activity, and a real fever would raise concern for infection. So, a slight decrease in body temperature is not an expected change during labor.

During labor, the body activates systems to meet the increased energy and oxygen needs from uterine contractions. The heart rate rises to boost cardiac output, the respiratory rate increases to supply more oxygen and remove CO2, and blood pressure can rise in response to pain and sympathetic stimulation. Temperature, however, typically stays the same or rises slightly due to heightened metabolic activity and heat production from exertion; a decrease in body temperature would be unexpected. A slight rise in temperature can occur with labor, dehydration, or increased muscle activity, and a real fever would raise concern for infection. So, a slight decrease in body temperature is not an expected change during labor.