My bb is now 7 months no turning by himself. He only turning half when he was 3 months. I think my bb don't like turning. Nurse in Hospital said it is ok. Some bb no turning, don't worry. My bb is now sitting at 5 months.
My BB can turn from right to left on 4.5 month & from left to right on 5 month. Now, he can sit properly for a while & move downward to touch his feet!