"a fertilized egg is a person"... Hm, so a salmon lays thousands of eggs and the male just mass fertilizes last I knew. I doubt the season matters much when they are kept in controlled environments. Wouldn't they breed year round as their birth place is there home? If so. Jump that number up by a lot. If someone murders a pregnant mother the judge doesn't say, well there is a x% chance it doesn't make it to adulthood.