ok so, this is how i see it, face hugger, implants queen, queen comes out, sheds skin, coccoons, comes out as reall bulky alien, molts, becomes a preterion, has the mouth thingy, molts agian, comes out a queen. real, well.... kinda simple
frankly i dissagree with a bunch of the alien/pred stuff, so i reject it a substitue it with what i want