Hello doctor. My son reached his first birthday yesterday. Before Two days of his birthday he just kept two steps on his own and then sat. After that he din walk. He is only crawling. Actually my son was born in eight months with 2.5 kg without any problem. Normal delivery. He was normal. But his legs was shivering till six months. My pediatrician told that he ll be alright when he is six months and as he said shivering stopped. His other activities were normal like other babies. Before one month when I went to hospital to say that he din walk yet. Doctor said his knees are little weak. Nothing to worry and he ll walk in by fourteen months. But before his birthday itself he kept two steps for two days. After that he is not walking. Only crawling. What's the reason? When he ll was walk?