Minecraft wiki entry for Egg, associated text: Eggs break mid-fall if hit by another projectile; the chance of spawning a chick is not affected.
Throwing an egg at a nether portal breaks the egg when it hits the portal.
A thrown egg faces toward the player in first-person view while it appears rotated horizontally in third-person view. This is the case for all throwable items (ender pearls, eggs, snowballs, and all type of throwable potions).
Due to a bug, it is possible to kill chicks that hatched from an egg less than ten seconds ago by throwing four eggs at them.‌[Java Edition only]