When is a baby valuable enough to not abort?

An unborn baby, or a fetus (still a baby, just in Latin), is human. Pro-aborts will claim that viability, consciousness, or any other number of points in development are what give the baby enough value to make it morally wrong to kill. These are all arbitrary points! No matter at what stage of prenatal development the child is in, it is wrong to end the life of an innocent human.