Final answer:
The nursing intervention for a postpartum woman with a boggy and deviated fundus is to perform fundal massage and monitor for excessive bleeding.
Step-by-step explanation:
The nursing intervention for a postpartum woman with a boggy and deviated fundus is to perform fundal massage and monitor for excessive bleeding. When the fundus is boggy and not contracting properly, it can lead to postpartum hemorrhage. By massaging the fundus, the nurse can stimulate contractions and promote the expulsion of any retained placenta fragments, helping to prevent further complications.