Inpatient Obstetric Nurse (NCC) Practice Exam

What physiological change occurs in a mother's pulse during the fourth stage of labor?

1. Pulse frequently decreases

2. Pulse remains constant throughout

3. Pulse increases and then gradually slows

4. Pulse rapidly accelerates

The correct answer is: Pulse increases and then gradually slows

During the fourth stage of labor, which begins after the delivery of the placenta and lasts for about one to two hours, there are significant physiological changes that take place as the mother's body starts to recover from labor. One notable change is the increase in pulse rate. This initial increase is the body's response to the considerable physical exertion and stress endured during labor, along with fluid shifts and hemorrhage that may occur. After the immediate postpartum period, the pulse may gradually slow down as the mother's body stabilizes. This reflects a transition from the acute physiological stresses of labor to a more stable condition. Therefore, the pulse initially increases due to these factors but generally returns toward baseline as the mother's condition stabilizes. Understanding this change helps in monitoring the mother's vital signs and overall recovery during the critical postpartum period, ensuring that any abnormal changes can be promptly addressed.