Yes bumbleymummy, but isn't the point that the foetus/bundle of cells/baby/ whatever you want to call it, is a part of a woman's body, until the time when it is capable of surviving on its own outside of her body?
Otherwise you'd have to consider that every unfertilised egg or sperm was a potential human life too.
And if it's part of a woman's body, then it's her choice what to do with it. No one else's.
I think it's like being a vegetarian. I'm a vegetarian, because I don't want to eat dead animals, but I don't think I should be able to impose that choice on anyone else. If you don't believe in abortion and choose not to have one yourself, fine. But don't try to impose that choice on others.
Anyway, I signed the petition too.