Abortion problem solved.

fetus < 20 weeks old is not sentient
fetus > or = 20 weeks old is sentient

"If dependance was the issue killing hobos would be justified, but we don't do that because we drew the line at foetuses."

The line was drawn at sentience, but for some reason you harbour the irrational belief that not all humans with brain activity are sentient.

"Also, if a mother has waited that long to squish the little lump then she should give birth to it."

Is the "lump" sentient or not? Why did you refer to a baby as a "lump"? If you have some huge problem with babies and 6-8 month old fetuses (can survive outside the womb) being treated as human tell us and save us the trouble of guessing why. If it is because it has brain activity, but no or few memories, surely the same could be said of any baby, or someone sufferring from brain damage, will you admit you believe it is ok to kill them? Do you know enough about the workings of sentience to prove your assertions? It is obvious that if there is no brain activity in a human the human is dead, this is the most accurate definition for whether something is sentient or not.

"A majority of abortions occur shortly after the woman discovers that she is late"

The pregnancy bump is obviously visible after 28 weeks, by this time the person must know that they are pregnant. Do you think that abortion should be banned if the fetus can survive outside the womb?

"so too bad that I won't teach my hypothetical daugher to pee on a piece of plastic after every sexual encounter"

You are willing to miseducate your daughter to increase the likelyhood of her experiencing teenage pregnancy to prove a political point to some random person across the internet?

P.S. I'm not a christian fundamentalist christian so you can't avoid this argument using the extremist tactic of claiming all your critics are the opposite extreme. In my view extremists such as yourself and christian fundamentalists are 2 cheeks of the same ass, if you feel differently seperate this issue from your answer to my other points. My political opinion is largely utilitarian-libertarian if you want to know.