In Canada abortion is a matter between a woman and her doctor. For women who are underage, the choice is hers and there is no parental consent involved.
If you don't believe in abortion, don't have one. The fact that you think a woman's choice ends when she has sex shows that your real agenda is to enforce chastity.
Half the women who have abortions are married with one or more children. Are you seriously suggesting married women abstain from sex with their husbands unless it's for procreation? You knows that's grounds for divorce in some jurisdictions.
Have you not heard of contraceptives? They allow you to have sex without getting pregnant.
If you don't want a baby, use them. They're not just for single people you know.
Contraception doesn't always work.
For instance, my sister in law got pregnant the first time because a diet medication she was taking cancelled out the effect of her birth control pills. (This diet medication was later pulled from the market by the FDA).
God, you really are ignorant of how lady parts work, aren't you?