No, its not. If it cannot survive on its own, without the help of a host... it does not have a life of its own.
'Life of its own'? You mean, like, over 18 and not dependent on parents?
You
do realize that you remain dependent upon other organisms for your survival for the entirety of your life, right?
If the host does not want to preform its part of the relationship...
I find your misogyny offensive. By referring to women as 'hosts', you dehumanize them and reduce them to something less than human beings, something to be used for your own purposes. It's highly demeaning to your own mother and all women who have ever had children. It reveals a deep hatred of women and womanhood that you really ought to deal with.
As for women not wanting to be mothers, there are far too many options available for you to bitch about it. You have plenty of opportunities to avoid pregnancy. You can use an IUD, take the pill, use the foam, use a condom, not have sex, have hysterectomy, use Plan B, use spermicidal lubricant, use a diaphram- and probably other options I've neglected to mention that someone else can point out. The helpless female card only degrades women by portraying them as all being too stupid to be responsible for themselves and take control of their own reproductive abilities using the means available and preferred. Not only do you clearly have a deep disdain for women and womanhood, but I find it very offensive that you insult the intelligence of all the women in the world by assuming they have no idea what sex is and are incapable of being responsible for their bodies and their decisions.
Also, for the record, all
you are today is a collection of cells. That never changes. If you want to argue that killing an unborn child is okay, then make your argument, but don't lie about what we're discussing and don't insult and degrade all of womankind in order to do so.