I normally would not be against contraceptives, but I have voted against the pill. Reason being, the pill can kill the fetus. What the pill does is prevent the sperm from reaching the eggs by a certain mucus. But occasionally, sperm can get through the mucus, and the zygote can be fertalized. If this is the case, the zygote either is killed (it turns into a morning-after pill), or it gets a serious disorder. So I therefore vote against it.
No it doesn't, i don't know where you got your biology lessons. It works by altering the amounts of hormones in the blood, which can either stop the egg being released, or stop a fertilised egg from attaching itself to the uterus lining
