All you should worry about are red flags that indicate slow development, not comparing with other babies. Being able to turn at 4 months seem perfectly fine. Each baby has their own pace and how fast they reach their milestones now is no indication of how well they will do in the future. So stop worrying and don't compare, when baby grows older I don't think they will appreciate being compared to other children :)
Every child is different and progress in their own pace. As long as the doc didn't any concern during the routine checks, don't need to worry too much. :)
Every child progress differently. Your child is progressing normally. Tell your mil that she can't expect every child to progress exactly the same.
Every child's progress is different so I don't think there's a need for comparison. Don't stress yourself out too much!
It’s fine. All babies are different. Some achieve certain milestones faster than the others.
Anonymous