It DOES confuse me that you seem to have picked 'unique DNA' as the test of when a foetus gets full human rights simply because it is easy to determine, instead of a reasoned judgement, yet you seem to think the judgement is obviously correct. The bible doesn't mention DNA or even hint at its existence. How has the DNA argument got such a hold on you?
Feeling your judgement is 'obvious' means that you don't have to think at all or consider the arguments. It makes your life simple and black and white, with no awkward moral judgements to make and no difficult issues to resolve. If that is the limit of your cognitive abilities, then you are welcome to that.
The topic of protecting the unborn IS black and white. Utilizing AOD for convenience (which is why most abortions happen) is punishing an innocent, unborn baby for his/her parent's decision to create him.
How is it fair to a child to end their life just because the parents are too selfish to take responsibility for the life they willingly created?
Consenting to sex IS consenting to the very real possibility that a child might be created.
There are one of two outcomes when a pregnancy occurs: the mother and child can BOTH live and thrive or ... the unborn baby can be intentionally and viciously torn apart while still in the womb.