Comparing snapshots of organisms isn't that useful. C. Elegans is never going to turn into a conscious human being.
Personally I am pro-choice, but if you are really pro-life you cannot morally allow for exceptions in the case of rape or incest- unless of course your stated agenda isn't the same as your real agenda
I don’t know who you’ve heard that viewpoint from (abortion is wrong except in cases of rape/invest) but I don’t believe that and I don’t know anyone who does. I think it appears as a political concession and rarely (if ever) as a sincerely held belief.
And yes, that means I think common in-vitro fertilization practices (including making multiple zygotes and throwing some out) are morally wrong and equivalent to abortion.
If anyone disagrees, I contend it's because of the moral implications, not any lack of soundness in the scientific or logical arguments.
The unborn that are getting killed can typically move about, feel pain, and respond to injury. They react in agony when being torn apart or injected with brine.
They have brainwaves, which is the usual standard (varies by state law) we use to draw the line at the end of life, with the loss of brainwaves meaning death. Obviously we don't need to check dusty old bones or a person chatting with the doctor, but we do check in the difficult cases.
Consistency demands that our standard for one end of a lifetime be as similar as possible to our standard for the other end of a lifetime. That standard for death, subject to minor variations in state law, is brainwaves.
Conveniently, such a standard eliminates the rape excuse. There is plenty of time prior to brainwaves.
... so far, it’s sounding eerily like reasons people used to use for enslaving Africans in the 18th century.
The parallels are pretty obvious, and they do not require a ruler and compass to construct.