Doesn't solve what you want it to solve, though, because the woman carrying the foetus is also a person. Where does the balance between what may be conflicting rights between the two come? You still need to decide that. EG: you may have to kill the foetus to save the mother's life. There is no equivalent moral dilemma elsewhere, except perhaps with conjoined twins.
Even if you extended the concept of rights to a foetus, a strong bias towards the rights of the person who is already a fully conscious and autonomous individual is surely right here if there is a conflict. And if there is no conflict, then the rights of the foetus will be identical to the rights of the woman on whom its development depends.
From what I can tell, rights of the foetus arguments are generally made by people who wish to prioritise its welfare over that of the woman wherever there may be conflict between the two. I'm perfectly comfortable with the idea that the woman should retain autonomy over her body when she is pregnant to safeguard against that.
You mention dogs. Well if you're looking at this from a developed conscious awareness perspective, a dog is more aware than a foetus. Add to that the fact that the foetus is not yet capable of independent survival, while the dog is, and it doesn't seem unreasonable to me that a dog should have more legal protection than a foetus. Seems to me that you need to add in religious arguments about a unique human soul to get around that, in which case you are now in territory where anti-abortionists roam.
It is a very very difficult area. There are two people involved, and to try and balance the 'rights' of one over the other is almost impossible.
As I said earlier, in the same hospital at the same time, you may have one group of staff ending the life of a 24 week old foetus, and another group striving to maintain the life of a 24 week old premature baby.
I do think that legal abortion is necessary. Making abortion illegal would simply see a return to the previous 'backstreet butchery' which existed before the enactment of the current law, which would not be a good outcome for anyone.
The case at the root of this thread may end up having unforeseen consequences. The situation is, that what is being sought is effectively a legal ruling that the conduct of the mother caused irreparable damage to a child, and as a consequence, the child is entitled to financial support to enable as good a life as possible. Fair enough. However, I find it difficult to find that the mother's conduct has damaged the child, and a sum of money be paid, without a finding of criminality against the mother. It seems that a progression is being sought from step 1, the damage, to step 3, the award, whilst missing out step 2, criminal proceedings to establish guilt. Because of that, I have a strong suspicion that the court will find against, and an award will not be made. To do otherwise opens a colossal can of worms, and would lead to a deluge of similar cases.
Should women be prosecuted because their behaviour during pregnancy has damaged their child? I don't know. Were such legislation to be introduced, I cannot see how the matter of guilt can be proved. It is inconceivable that a woman, having chosen to carry a child to term, would wish to deliberately harm the child.
It is clear that in this particular case, the support that should have been extended to the mother was not in place, had it been, then the case may never have happened.
I do think that there is scope to widen the area of protection of the foetus, whilst still retaining the availability of abortion. I'm not suggesting that protection of the foetus should be used as a 'back door' to abolish the existing abortion law. As I have stated many times before, I do not like abortion, but, am not agin the woman's right to choose.