They are little clumps of cells that cannot survive without a host

I agree that fetuses start out as clumps of cells, which is why I support first trimester abortion. But many pro abortion people believe in abortion literally up until the day of birth, which I find insane. No intellectually honest person can look at a fetus that's ~6-9 months developed and call it just a clump of cells. It's clearly forming a human being by those later months.

To a woman who does not want to carry to term, a fetus also fits the definition of a parasite.

A child could also be described as a parasite because the parent has to take care of them. The same could also be said of a disabled adult. Yet those people have the right to not be murdered simply to stop their inconveniences on their caretakers. Why?

Anti-choice is exactly what this is.

Sure, but by the same logic, you are also "anti-choice" if you are against any form of murder. The murderer should have the right to murder! It's just his "choice", after all.

Society regularly restricts choices that can harm others. Why is abortion a special choice?

This isn't even about abortion; this is about half the population not having autonomy over their own freaking bodies.

A fetus actually starts out as another human body with its own unique DNA. Just because the mother provides it with nutrition for 9 months does not make it "just" another part of her body.