The nurse is preparing to administer oxytocin IV to a client after the delivery of her infant. Which outcome should the nurse expect from the administration of oxytocin?

A. Expulsion of the placenta: While oxytocin can facilitate the third stage of labor, the primary role of IV oxytocin postpartum is not to directly expel the placenta but to promote uterine contractions and reduce bleeding. B. Return of the uterus to prepregnancy size: Uterine involution occurs gradually over weeks and is supported by uterine contractions, breastfeeding, and endogenous oxytocin, but this is a longer-term effect rather than the immediate outcome of IV oxytocin. C. Stimulation of uterine contractions: Oxytocin directly stimulates uterine smooth muscle, promoting strong contractions to prevent postpartum hemorrhage and support uterine involution. This is the expected immediate outcome when administered IV after delivery. D. Activation of the let down reflex: The let-down reflex refers to milk ejection during breastfeeding, which is triggered by endogenous oxytocin released in response to nipple stimulation, not IV administration for postpartum uterine contraction.