Are Pokémon Egg genders predetermined?
A Pokémon’s Ability, Nature, Gender, Shininess, IV’s, Characteristic etc. is determined when the Egg is given to the player by the Day Care Man. So the answer to your question is no.
Can you get different Pokémon from eggs?
The Pokémon you get out of an egg depends on when you obtained the egg, not when you hatch the egg. Tapping on the egg and scrolling down in the app will list out the potential Pokémon you can get from that egg, by rarity. The more egg icons it has, the rarer it is to hatch.
Are egg Pokémon natures predetermined?
If its the nature you want keep it. If not turn off and hatch the egg again. The stats of an egg are calculated when you get it. If you save before it hatches, no matter how many time you turn off and try again the result will be the same.
What Pokemon has 12K eggs?
Some of the Pokemon creatures that can be hatched with 12K eggs include Larvitar, Scraggy, Trubbish, and Vullaby. The Strange will still be available in Pokemon GO after the conclusion of the event. It is likely that players will need to travel 12 kilometres to hatch the eggs after the event ends.