What period in time will the egg die if it is not fertilized?

If an egg is not fertilized, it typically has a short lifespan. In humans, for instance, an unfertilized egg can survive for about 12 to 24 hours after ovulation. If it is not fertilized during this time, it will disintegrate and be reabsorbed by the body or expelled during menstruation. In other species, the lifespan of an unfertilized egg can vary but usually remains within a similar time frame.