there are some things that are inalienable that can not be voted away by the majority of the electorate. That’s why civil rights are not voted by the electorate – they are inalienable.
the woman, while carrying a fetus has the same inalienable rights she had, before carrying a fetus. If you want to make an amendment to the constitution conveying those rights to a fetus, or embryo, or to sperm and egg, then go ahead and try.
my opinion is that you are trying to legislate your religious beliefs.
if you succeeded you would then find a constitutional tension between the rights of the fetus/embryo/sperm/egg, and those of the woman/doctor/healthcare provider.
how would we solve those constitutional tensions.
and of course how would you stop the myriad of woman who would die from botched back alley abortions, while the wealthy would still find a doctor to perform the procedure?