Recurrent Pregnancy loss in usually defined as 3 or more spontaneous pregnancy losses (not necessary consecutive).Pregnancy loss is the most common complication of pregnancy & it is estimated that fetal viability is only achieved in 30% of all human conceptions, 50% of which are lost prior to the first missed menses. While spontaneous abortion occurs is approximately 15% of clinically loss occurs in about 1-2% of this same population.