My baby is 5 months 28 days old......still he cannot roll over.....His weight is 5.6 kg.....It should be worried or not

A. hii Your baby tends to have doubled his birth weight by the time he turns 4 to 5 months old. As per the average baby weight chart, the weight gain of your baby during 6-12 months drops to 57 to 113 grams per week. By the time your baby turns one-year-old, he tends to weight about 2 1/2 – 3 times his birth weight.