Something that i find prettyd disgusting these days is how certain people put their political ideologies / viewpoints over human lives, for example, celebrating the russian invasion of ukraine because it is “a blow against US / NATO imperialism” completely ignoring all the warcrimes, the deaths, and the suffering generated by that war, the same happening with the palestinian genocide because “Israel is the only working democracy on the middle east”, acting like their ideoligies are going to bring back to life all the dead people somehow
So you recognize that humans have a developmental process. You agree that sperm and egg are not a human. So somewhere in between there must be a line or we at least can come up with some criteria to define a line. So why are you against abortions, since you seem to not think that a blastula is indeed the same as a child?
I don’t think the line is birth. We can quite clearly see with technology that a child does indeed exist within the womb.