A human embryo isn't a human person or being, it's an embryo. If I extract a living, human cell from my human body, that one cell or clump of cells is human and alive, but it's not viable unless it's attached to a human being (attached to me). The human embryo needs to be attached to a human being, namely, the woman. You can't force a woman to remain pregnant with an embryo that she's conceived within her body, just because you've determined or a group of religious folks has deemed that embryo to have the right to develop within her body. She should be afforded the right by society, to determine whether she's going to remain pregnant or not, not you or I or anyone else but her.