my baby gir is 5 months old, and weighs 8.5 kg, she isnt rolling over to her tummy. i asked the doctor and he said because of her weight it will take some time. is it ok should i be worried about her crawling and rolling at the moment

A. Rolling is one of baby's first significant motor milestones. ... Some babies are ready to roll from the get-go, while others take their time. On average, babies tend to first roll from tummy to back between 2-5 months, from back to side between 4-5.5 months, and from back to tummy between 5.5-7.5 months.