Hi, my baby is 4 months 18days he didn't rolled over. is it normal to not rolling over his weight is 8kgs should I consult my doctor

A. hello baby weight is lil more but f active then not a problem..Babies start rolling over as early as 4 months old. ... At 6 months old, babies will typically roll over in both directions. It's common for babies to roll over from tummy to back for a month or two before rolling over from their back to front.