April 13 (Reuters) - U. It said the government's arguments for an emergency stay of the ruling focused on the potential harm of pulling mifepristone from the market entirely but that it was "difficult to argue" that the 2016 changes "were so critical to the public given that the nation operated - and mifepristone was administered to millions of women - without them for 16 years. The Justice Department has said the challengers have no basis for second-guessing the FDA's scientific judgment and that when used as directed, adverse effects of mifepristone are exceedingly rare "just as they are for many common drugs like ibuprofen