Final answer:
The priority assessment in the fourth stage of labor is assessing the uterine fundus and lochia, which helps prevent hemorrhage and detect signs of infection.
Step-by-step explanation:
The priority assessment in the fourth stage of labor is assessing the uterine fundus and lochia. This stage, often referred to as the postpartum period, involves monitoring for post-birth complications such as hemorrhage and infection. The uterine fundus is palpated to ensure it is firm and contracting, which helps prevent excessive bleeding. Lochia, the vaginal discharge after delivery, is inspected for quantity, color, and consistency to identify any abnormal bleeding or signs of infection.
Other assessments such as checking the mother's temperature, encouraging food and fluid intake, and providing privacy are also important, but they are secondary to ensuring the physical well-being of the mother immediately after delivery.