HI My Name Is Srinivas Reddy Gaddam...last Month My Wife

HI my name is srinivas reddy gaddam...last month my wife got period(date) on 11/15 but this month she excepted at that date but she did not get at right time..it is already 5 days passed...there is any tablet where she can get period...generally here %of blood is less i think that the problem.