| Obstetrical history | 
        Modalities | 
        Cases | 
        Controls | 
        OR | 
        95% IC  | 
        p | 
       
      
        | n | 
        % | 
         n | 
        % | 
       
      
        | Number of delivery | 
        Paucigravidae | 
        22 | 
        34.9 | 
        51 | 
        40.5 | 
        1 | 
          | 
        0.824 | 
       
      
        |   | 
        Primigravida | 
        22 | 
        34.9 | 
        36 | 
        28.6 | 
        1.41 | 
        0.68-2.9 | 
       
      
        | Multigravida | 
        10 | 
        15.9 | 
        20 | 
        15.9 | 
        1.15 | 
        0.46-2.8 | 
       
      
        | Grand multigravida | 
        9 | 
        14.3 | 
        19 | 
        15.1 | 
        1.09 | 
        0.43-2.78 | 
       
      
        | Abortions | 
        No | 
        49 | 
        77.8 | 
        81 | 
        64.3 | 
        1 | 
          | 
        0.049 | 
       
      
        | Yes | 
        14 | 
        22.2 | 
        45 | 
        35.7 | 
        0.5 | 
        0.25-1.00 | 
       
      
        | Type ofabortions | 
        Spontaneous | 
        8 | 
        12.7 | 
        41 | 
        32.5 | 
        1 | 
          | 
        0 | 
       
      
        |   | 
        Induced | 
        6 | 
        9.5 | 
        3 | 
        2.38 | 
        10.25 | 
        2.07-49.7 | 
       
      
        | Spontaneous and induced | 
        0 | 
        0 | 
        1 | 
        0.8 | 
        0 | 
        - | 
       
      
        | Circumcision | 
        No | 
        46 | 
        73 | 
        121 | 
        96 | 
        1 | 
          | 
        0 | 
       
      
        | Yes | 
        17 | 
        27 | 
        5 | 
        4 | 
        8.9 | 
         3.11-25.5 | 
       
      
        | IPPH | 
        No | 
        55 | 
        87.3 | 
        122 | 
        96.8 | 
        1 | 
          | 
        0.001 | 
       
      
        | Yes | 
        8 | 
        12.7 | 
        4 | 
        3.17 | 
        4.44 | 
        1.28-15.37 | 
       
      |