WASHINGTON — Barack Obama, the first president to appoint two female justices, may have a chance to name a third during his second term in office and deepen his imprint on the Supreme Court.

With four justices 74 or older, actuarial tables alone suggest Obama will have another vacancy or two to fill before he leaves the White House. The oldest of the court’s nine members, Ruth Bader Ginsburg, 79, has indicated she might retire in the next few years.