Retained eggs are often very problematic with regards to the long-term health of the female. I'm hoping that your vet did not administer pitocin to the female. Pitocin is a synthetic form of oxytocin, the hormone responsible for the initiation of uterine or oviducal contractions. It's used by vets on many types of animals, but its administration with snakes is largely unsuccessful. It typically creates a scenario where the oviduct contracts so tightly around the unpassed eggs that it is impossible to retrieve the eggs through any means but surgery.
Keep your female well hydrated and keep us posted.