The world health organization defined abortion or miscarriage as : the expulsion or extraction from its mother of a fetus or an embryo weighting 500 grams or less ,or any other wise product of gestation of any weight irrespective of gestational age and weather or not there is evidence of life and weather or not the abortion was spontaneous or induced Miscarriage is the most common complication of pregnancy occurring in 10-20% of clinically recognized pregnancies (Bag. It is estimated that around 40% of early pregnancies result in miscarriage. A large majority of those are lost before the menstrual period is missed. More than 80%of abortions occur in first 12 weeks of pregnancy, and the rate decrease there after For clinical purposes: abortion is subdivided into: threatened abortion, inevitable abortion, incomplete abortion ,missed abortion ,septic abortion ,and recurrent abortion