Sorry to be the one to tell you, that no respectable scientific or medical organization argues that unborn babies are not human and alive.

Life begins at conception, personhood (a legal concept begins when the law says it does), and citizenship at birth.

Even in Roe v Wade, the liberal Supreme Court went out of its way to make clear unborn babies did have human rights. Hence, the court made a distinction between viable and alive. Prior to viability it ruled the mother's rights were "superior" to the unborn baby's rights... not that the unborn baby had no rights.

So, whatever you stance on abortion, dismissing an unborn baby as "not human" or "not alive" is simply wrong, though it can be convienent.