Eggs can be found on the PokéStops and GYMs, 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.
|Oeuf de 12 KM
|Oeuf de 10 KM
|Oeuf de 10 KM (Adventure Sync Rewards)
|Oeuf de 7 KM
|Oeuf de 5 KM
|Oeuf de 5 KM (Adventure Sync Rewards)
|Oeuf de 2 KM