What Does Absence Of Bleeding After Taking Abortion Tablets Indicate?

my wife have 6 week pregnancy and we don t want this child. my wife take 4 cytotec orally first dosage and after 12 hours take 4 tablets 2nd dosage, then after 12 hours take 4 tablets arthotec and after 12 hours take 4 tablets. but period still not start. kindly guide us...