Boss
Take a Memo:
I agree with much of your statement and think you have a reasonable solution... A bit stricter than I'd propose but in the ballpark. I don't agree with your opening statement about the "organism"... it IS part of the woman's body. It is made up of her DNA, it is feeding and developing off of her body. The idea Of making this a "person" is a social construct that varies depending on or personal, religious, and cultural beliefs. While this makes it a relevant arguement and discussion it does not make it fact.
No it's NOT made up of her DNA. It has it's own unique DNA. It has half of her genes and half of the father's genes. It is deriving nutrition from the mother but that's how all humans (and mammals) begin life.
I don't subscribe to the "personhood" thing because that is semantics. Biologically, at point of conception, it becomes a living human organism in the state of being... aka: a human being. It hasn't fully developed and it won't fully develop for about another 18-20 years or more. That doesn't change what it already is and has been.
I don't have a religious objection to a mature discussion on when it's appropriate to terminate a human life. I know some people do but I don't. However, I do think it is an ethical thing and at some point in fetal development, the fetus should be protected by basic human rights. Certainly, after the 1st trimester.