Does one mating fertilize all goose eggs inside her or does she have to mate for each egg she lays?

A female goose can store sperm from a single mating for several days to weeks, allowing her to fertilize multiple eggs from that one mating. Therefore, she does not need to mate for each egg she lays; one successful mating can fertilize all the eggs in a clutch. However, if she mates again, she can potentially fertilize additional eggs with new sperm.