Oh indeed. And since when is being a parasite or not being a parasite, per se, a recognizable condition in law that deprives you of rights? The typhoid bacilli has been around a lot longer than a human fetus, and being infected with typhus is every bit as natural a biological fate as being fecund with a human fetus.
OTOH, when the fetus implants itself on the especially prepared inner lining of the uterus, the woman's body responds by inducing bodily changes and marshalling resources to SUSTAIN and DEVELOP the fetus. The fetus TAKES NOTHING from it's host. All its needs are 'lovingly' GIVEN to it by the host, for the purpose of sheltering, nourishing, and developing the fetus to the point where the fetus is delivered, by it's host, to a new stage in its, now, approximately 9-month old life.
The fetus has not taken control of any measure of it's host's bodily function, as does a virus. The fetus is simply there, developing itself, while the host caters to its needs. It is a one-sided symbiosis ... one living organism nurturing and providing for another, in exactly the way it has been designed to do.