Situation: A 26-year-old primigravida at 39 weeks' gestation is admitted to the labor room of a district hospital. The hospital monitors labor with the traditional modified World Health Organization (WHO) partograph used in the Department of Health (DOH) Essential Intrapartum and Newborn Care (EINC) module, which starts plotting the active phase at 4 cm of cervical dilation. Her membranes are intact, and her prenatal course was uncomplicated. The client asks what is meant by the fourth stage of labor. The nurse explains that it covers which period?

The fourth stage of labor is the first 1 to 2 hours after delivery of the placenta. It is the period of highest risk for postpartum hemorrhage, so the fundus, bleeding, vital signs, and bladder are checked frequently.

The fourth stage of labor begins immediately after the placenta is delivered and extends through the first 1 to 2 hours postpartum. This period is often called the recovery phase or immediate postpartum period, and it is distinct from the third stage, which ends with placental expulsion.

The physiologic rationale for designating this as a separate stage is that the first two hours after placental delivery carry the highest risk for postpartum hemorrhage. Once the placenta separates, the uterine muscle must contract firmly and persistently to compress the open spiral arteries at the placental site. If uterine atony occurs during this window, bleeding can become rapid and life-threatening before clinical signs are obvious. Romero and colleagues emphasize that maternal deaths during parturition occur mostly among healthy women and are often preventable, with hemorrhage representing one of the most critical life-threatening complications ^[1]. This underscores why structured monitoring during the fourth stage is a core nursing responsibility.

During the fourth stage, the nurse performs frequent assessments at defined intervals, typically every 15 minutes for the first hour and then every 30 minutes during the second hour. The key parameters include:

Assessment	Purpose
Uterine fundus	Check firmness, position, and height; a boggy or displaced fundus suggests atony or bladder distention
Lochia and bleeding	Quantify vaginal blood loss; saturation of one pad in less than 15 minutes indicates excessive bleeding
Vital signs	Detect early hypovolemia; tachycardia and hypotension are late signs of significant blood loss
Bladder status	A full bladder displaces the uterus and impairs contraction, increasing hemorrhage risk
Perineum and comfort	Inspect for hematoma, edema, or ongoing laceration bleeding

Watch out! The fourth stage is not synonymous with the puerperium. The puerperium, or postpartum period, lasts approximately 6 weeks after birth and encompasses the entire interval of reproductive tract involution. The fourth stage is only the immediate 1 to 2 hours within that broader timeframe.

Key point! The stages of labor are sequential and non-overlapping: the first stage spans from true labor onset to full cervical dilation, the second stage from full dilation to birth of the baby, the third stage from birth of the baby to delivery of the placenta, and the fourth stage from placental delivery to 1 to 2 hours after. Option 2 describes the third stage, option 3 describes the puerperium, and option 4 describes the second stage.

In the context of the modified WHO partograph used in the EINC module, the partograph primarily tracks the first and second stages through cervical dilation and descent. However, the fourth stage remains a distinct clinical phase requiring separate documentation and vigilant nursing surveillance. The emphasis on early postpartum monitoring aligns with the global observation that a substantial proportion of maternal morbidity occurs in the immediate hours after delivery, when timely recognition of abnormal bleeding can prevent progression to severe hemorrhage ^[1].