Why shouldn't pregnant women deduct these "children" from their tax obligation like any other child? Especially after Roe is overturned. Surely a pregnant woman

Why shouldn't pregnant women deduct these "children" from their tax obligation like any other child? Especially after Roe is overturned. Surely a pregnant woman counts as a caregiver to these "unborn children" and entitled to a tax credit? That would help the children these voters are so concerned about!