#AskTheExpert Hello Doctor! My baby boy is 10 months old now, and i am concerned about his one habit...He does pelvic rocking movement whenever my mom use to make him sleep on her belly....He usually starts these movements at slower pace but does more vigorously with time...He only does these movements at night or whenever my mother tries to make him sleep on her belly. These movements are getting stronger day by day.... earlier we use to think that this is normal....but these movements are very different. he does this to make himself sleep which is otherwise a very difficult for him. My Child is otherwise a normal, attaining his milestones on time. please suggest what are these movements?