re: #307 sagehen

Not even.

My nephew is absolutely, definitely, unqualifiedly a discrete, constitutionally protected life. But if he wants my kidney, or my bone marrow, even if his life is at stake, it’s still entirely my call whether I let him take what he needs.

i dont want to get down in the weeds too much - just a little - these are different scenarios
in yours you have two fully protected independent lives. there is no clash of rights your nephew has no right to your body parts. he doesnt take them. you voluntarily donate them.

not so with pregnancy. there is only one constitutionally protected life from the start. the other develops and garners something over time. - it is admittedly unclear and somewhat arbitrary as to when. it will be a hard road to argue a normal three day before ordinary birth fetus is in no way different than few days old blastocyst. you dont need a moral argument to know that.

that is as unrealistic as “all life begins at conception”