In the latest flurry of activity across the U.S.  following the Supreme Court Decision overturning Roe V. Wade challenges on laws already on the books are playing out differently in lower courts. Roughly half of all states are expected to prohibit or limit abortions following last week's historic ruling. As so-called "trigger laws" are now in play.

They're bans or other restrictions that were either left on the books for generations tied up by legal challenges or specifically designed to take effect if Roe v. wade was abolished. Some have won challenges, like a law in Tennessee banning abortions as early as six weeks into pregnancy. That was upheld by a federal court Tuesday.

Even as a Texas judge temporarily blocked enforcement of that state's ban on virtually all abortions. These court battles are likely to persist for some time.