First, even though[some] fetal murder laws use the word "person," they do not confer constitutional personhood.
They confer only an artificial type of personhood, one that is not protected by the Fourteenth Amendment and that does not carry with it a "right to life." (90)
Second, feticide laws are not grounded in fetal rights; they are based on the interests of the state.
States can, and do, act to protect certain entities, even when those entities themselves have no rights.
Moreover, whereas abortion mediates between the opposing interests of the state and the woman, feticide laws pursue the same goals for both the woman and the state. In these scenarios, the state and the woman have similar interests, so the state can be more aggressive about pursuing its goals.
Finally, there is a clear difference between a pregnant woman consenting to an abortion and a nonconsensual attack on a woman that results in the loss of her pregnancy. The woman has a right to act; the attacker does not. Once we look below the surface, then, it becomes apparent that fetal legislation need not be viewed as a threat to women's rights.