Final answer:
Oxytocin is administered after delivery to stimulate firm contractions of the uterus, preventing excessive bleeding and promoting healing.
Step-by-step explanation:
Oxytocin is a hormone that is administered after delivery to stimulate firm contractions of the uterus. It is released by the pituitary gland and helps the uterus to contract and return to its pre-pregnancy size. Contractions are important for preventing excessive bleeding and promoting the healing process.