Ripley concludes, I can t survive it. The one inside me can generate thousands more. In fact, throughout the Alien series, the fecundity of the monster is portrayed as one of the most horrifying things about it. Most viewers do not take special notice of this because it is, after all, a monster that is spawning. Only when one recalls that the monster is a projection of a part of oneself does the real, though subliminal, message become clear.
Fertility is dangerous.
Babies kill mothers, so mothers should kill babies. In fact, that is exactly what happens at the end of Aliens III when the baby comes ripping out of Ripley s chest, and she takes it with her into a fiery death. The fetus as monster and the repugnant character of fertility are themes that are more blatantly developed in the two Species movies from the late 1990s. The first of these two films begins with eugenics and abortion. Alien DNA is combined with human DNA to see what it will produce.