A pregnant client during labor is irritable and feels the urge to vomit. The nurse should recognize this as the:

The signs described—irritability and the urge to vomit—are classic manifestations of the transition phase of the first stage of labor. This phase, characterized by cervical dilation from 8 to 10 cm, is the most intense part of labor. The powerful contractions, combined with rapid cervical changes and hormonal shifts, often lead to significant maternal discomfort, anxiety, irritability, nausea, and vomiting. The client may feel overwhelmed and lose the ability to cope, which are hallmark psychological and physiological responses during this specific period just before the second stage begins.

A. Fourth stage of labor: This is the immediate postpartum recovery period, beginning after the delivery of the placenta. The focus is on maternal stabilization, not active labor symptoms.

B. Third stage of labor: This stage begins after the birth of the baby and ends with the delivery of the placenta. The intense, painful contractions of the transition phase have ceased.

D. Second stage of labor: This is the "pushing" stage, which starts with full cervical dilation (10 cm) and ends with the baby's birth. The primary maternal sensation is an overwhelming urge to bear down.

1. Lowdermilk, D. L., Perry, S. E., Cashion, K., & Alden, K. R. (2020). Maternity & Women's Health Care (12th ed.). Elsevier. In Chapter 16, "Labor and Birth Processes," the transition phase (8 to 10 cm) is described with maternal characteristics including irritability, restlessness, and nausea/vomiting (p. 389, Table 16.3).

2. Ricci, S. S., Kyle, T., & Carman, S. (2021). Maternity and Pediatric Nursing (4th ed.). Wolters Kluwer. Chapter 14, "Labor and Birth Process," details the psychological responses during the transition phase, noting that women may become irritable, agitated, and feel out of control. It also lists nausea and vomiting as common physical findings (pp. 498-499).

3. University of California San Francisco (UCSF) Health. (n.d.). The Stages of Labor. In the section "First Stage of Labor," the transition phase is described as the most challenging, with symptoms that can include nausea, vomiting, and significant mood changes such as irritability. (Retrieved from UCSF Health's patient education resources on labor and delivery).