Final answer:
To assess uterine involution in a client in the postpartum period, the nurse can palpate the fundus, which is the top portion of the uterus and should be firm and located at or below the umbilicus.
Step-by-step explanation:
The nurse in the postpartum period immediately after delivery can assess uterine involution by palpating the fundus. The fundus is the top portion of the uterus and should be firm and located at or below the umbilicus after delivery. By palpating the fundus, the nurse can assess the progress of uterine involution and ensure that the uterus is returning to its pre-pregnancy size. This assessment helps to prevent complications such as postpartum hemorrhage.