my baby is 3 month old when he is sleeping some time I feel his leg is shivering...why once in week...not every time

A. its looks ok only it may be startle reflux also note this: Sleep pattern varies from baby to baby  Generally baby sleep for 14-16 hrs at this age  Keep a watch on urine output  Baby should pass urine minimum 6-8 times per day  Feed properly before sleep to ur baby Switch off or dim light before sleep  Sing a song or cuddle ur baby  Check and change urine and motion immediately after passing it Baby commonly wakes up 2-3 times at night for feed