Pokémon Eggs

Eggs can be found on the PokéStops, GYMs, and on weekly Adventure Sync events. Also a gift your friends send may have one in it. They will hatch after travelling certain distances. The Pokémon hatched from Eggs apparently have higher IV's.

12 KM Eggs
10 KM Eggs
10 KM Eggs (Adventure Sync Rewards)
7 KM Eggs
5 KM Eggs
5 KM Eggs (Adventure Sync Rewards)
2 KM Eggs