It's really pathetic how simplistic your reasoning is, and how utterly uninformed you are. The scenario you describe exists precisely because of the rights which protect a woman's right to obtain an abortion -- particularly, the right to decide for herself what happens to her body, and to be safe from unwanted assaults upon it.
That very right is what guarantees her the right to decide whether she becomes pregnant or unpregnant at her own discretion. It matters not one whit if a fetus is a person or not, though it is not. No person has the unqualified right to occupy the body of another person without that person's consent, nor to forcefully respirate from that person's bloodstream, nor to forcefully extract nutrients and return the favor with foreign hormones and waste. Any persons subject to such assaults have the right to use lethal force if necessary to defend themselves against it.
Now, seriously, go and learn a thing or two before you go shooting your pitifully ignorant mouth off some more.