| 
      Muscle strength measured in MRC grade. MRC: Medical Research Council ranging from 0 (=no movement, no contraction) to 5 (=normal)
        | Muscles & Reflexes | At time of diagnosis | Before pregnancy | During pregnancy | Post-partum |  
        | L | R | L | R | L | R | L | R |  
        | Upper limb |  |  |  |  |  |  |  |  |  
        | Elbow extension | 5 | 5 | 5 | 5 | 4 | 4 | 5 | 5 |  
        | Elbow flexion | 5 | 5 | 5 | 4 | 5 | 4 | 5 | 4 |  
        | Wrist flexion | 5 | 4 | 5 | 4 | 4 | 4 | 5 | 4 |  
        | Wrist extension | 5 | 4 | 5 | 4 | 4 | 4 | 5 | 4 |  
        | Adduction thumb | 5 | 4 | 5 | 4 | 4 | 4 | 5 | 4 |  
        | Abduction thumb | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |  
        | Lower limb |  |  |  |  |  |  |  |  |  
        | Foot plantar flexion | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |  
        | Foot dorsal flexion | 5 | 5 | 5 | 5 | 4 | 4 | 5 | 5 |  
        | Reflexes |  |  |  |  |  |  |  |  |  
        | Biceps | normal | absent | normal | absent | normal | absent | normal | absent |  
        | Triceps | normal 
 | absent | normal | absent | absent | absent | normal | absent |  
        | Achilles | normal 
 | absent | absent | absent | absent | absent | absent | absent |  |