The term Bad Obstetric History or BOH is usually applied to a mother in whom a previous poor pregnancy outcome is likely to have a bearing on the prognosis of her present pregnancy. The Habitual abortion is defined as the emergence of a number of at least three consecutive spontaneous abortions. Habitual abortion affects 1-3% of fertile couples. Cause of BOH may be genetic, hormonal, abnormal maternal immune response, and maternal infection. Identification of History of Bad Obstetric is challenge in today’s scenario.