Philip, too, died without a son, and his brother Charles succeeded him as Charles IV unopposed. Charles, too, died without a son, but also left his wife pregnant. It was another succession crisis, the same as that in 1316: it was necessary both to prepare for a possible regency (and choose a regent) and prepare for a possible succession to the throne. At this point, it had been accepted that women could not claim the crown of France (without any written rule stipulating it yet).