Inpatient Obstetric Nurse (NCC) Practice Exam 2025 - Free NCC Practice Questions and Study Guide

The fourth stage of labor is characterized by the mother's body beginning to return to a nonpregnant state, which is a crucial recovery phase following the delivery of the placenta. This stage typically lasts for about 1 to 4 hours after the delivery, during which various physiological changes occur.

During this time, the body works to restore homeostasis, which involves the uterus contracting to reduce its size and expel any remaining placental debris. Additionally, the mother's vital signs are closely monitored as she may experience transient changes as her body begins to stabilize. The physical processes occurring include the normalization of uterine muscle tone, involution of the uterus, and the re-establishment of blood volume.

In contrast, the other options present scenarios that do not accurately reflect the physiological changes occurring during the fourth stage. For instance, the body does not return to a pregnant state, nor are there typical increases in blood pressure or frequent fluctuations in pulse that are characteristic of this recovery period. Understanding these changes can help in monitoring the mother's wellness and identifying any complications that may arise during this significant post-delivery phase.