Why just first trimester?

[Platypus]

a fetus is a fetus when it is a fetus

fetus's should be aborted unless the mother's life is in danger, or rape, etc etc.

but an embryo is an embryo when its an embryo, and they should be allowed to be aborted. they don't have distinctive human functions. If you say we can't 'kill' an embryo you might as well say we can't kill an ant. perhaps we shouldn't, but I bet every single person here has killed an ant, or at least something similar. Embryos are not nearly as important as the fetus.

[Platypus]

should, shouldn't...what's the difference