The definition of when life begins has been imposed upon the states by the federal government? The definition that was enshrined and locked into stone by SCOTUS... YA that one...
That is one reason that i think the court will not turn gay marriage into a Roe v Wade thing.
Anyone with a brain knows life begins at conception. Roe should be overturned. I do not think that the court will give another bogus Roe decision. They are going to punt it.