Alien vs. Predator the Queen appears much bigger than the one seen in Aliens. This is probably an outcome of age as the Queen in Aliens was just extremely young whereas the Queen in Alien vs. Predator had actually most likely lived for a lot longer.
How are xenomorphs born?
The Xenomorph egg or Ovomorph is the earliest phase in the lifecycle of the different beasts in the “Alien” legend. Queens can lay the eggs however other Xenomorphs can likewise produce them by means of a procedure called “eggmorphing” in which they change a victim into an egg by trapping them inside a cocoon.