1 Let’s start with something uncontroversial that everybody should agree with, you can hurt your own body if you want, your body your choice, if you decide you want to mutilate your fingers, cut your legs or cut your pennies because you feel like a woman, you should have the right to do it … this is not even a hypothetical example, many people descide to hurt themselves and even mutilate their body simply because they feel pleasure by doing so
I feel you are being a bit too vague to flat out agree here.
But I will for the sake of argument.
2 so if the fetus / embryo is part of the mothers body,
It's not. It's inside here body, but it's not part of her body.
she should have the right to hurt (but not kill ) the fetus, for example if the fetus is a boy and the mother wanted a girl, she should have the legal right to cut the fetus’s pennies , or perhaps just for fun she should have the right to cut the fetus´s legs simply because she likes the idea of having a child that will always be dependent on her.
It´s horrible but it´s her body and her choice, so she should be legally protected by the law if she decides to do any of that stuff.
This falls apart completely simply by the fact that your first assumption is false.
It's not part of her body. It's a third party that resides inside her body.
But let's also give you that one, for the sake of argument.
Well-being needs to be taken into account here. Even if we consider it part of her body, it won't be X months later when it's born. And then it will have to live with the consequences, which would likely mean a life time of suffering.
So that's obviously not ok.
3 Or another way to see it, is if the mother has the right to kill the embryo, then mutilating it´s body (and not kill it) should also be ok.
An abortion is the termination of a pregnancy.
No "killing" is involved. That the unborn can't survive the procedure is unfortunate.
But, in your own words,
her body, her choice.
She has the right to refuse a third party to inhabit / make use of her body.
When she refuses you to use her body (with a kidney or whatever, or even just a blood transfusion) to treat some illness you have and you die as a result, then she did not kill you.
So it seems to be that if you are “pro choice” you should also be in favor of women hurting and mutilating the fetus/embryo
Only in case one agrees to all your false assumptions.
B) Provide and argument that would justify abortion and at the same time justify not hurting the embryo, in other words explain why is it ok to kill it and not ok to hurt it.
Well, I didn't even have to actually. Just pointing out your mistakes should be enough to discard your A/B here as a false dichotomy.
Anyhow, contained in my responses is the argument.
A summary:
1. The embryo is not part of her body. It's a third party that uses her body and takes it through a stressful period, which is not without danger at all, and which almost certainly will permanently change the body also in many aspects (changed metabolism, changed hormone balance, skin stuff, etc). And the rights to life of a third party do not override an individual's right to bodily autonomy.
2. messing with the embryo has great consequences for the person once it's born that will resonate throughout his / her life.