Damn it, JP. You're always beating me to it and posting my same replies before I can.
The definition of of life arbitrary. It was first created when we knew much less about science. We still need a term to define what most of us mean by life and most terms I've read require independent reproduction and response to environment/change. I see the latter as almost more "life like" than other factors. So, as a 'scientist', I would say no.
If one modified the definition to allow reproduction by any means, then we could in fact include viruses and prions...as well as computer viruses and even social memes (ideas..fads...even the "25 Things" surveys on Facebook). They are just molecules (or electrons on your screen) arranged just right so that other "alive" or" non-alive" factors cause them to replicate (RNA, etc). Some could see us as very lucky random pieces of matter that happened to be arranged just right a very long time ago so that we interacted with environment just right to carry on reproduction.
Independent of religion (I grew up Catholic), even as a kid learning biology, this seemed the most logical explanation/view of the world to me.
Also, as far as fetuses being parasites, they remain so even after birth. They feed off the resources of the mother (food, shelter, money), albeit voluntarily. Though, for most in this country, the early fetus stage of the parasite is voluntary as well.