usually from when the babies will start rolling on

A. Hello good afternoon !! Generally by 3 -4.5 months babies start roll over,some may roll early by 2.5 months while few roll by 4.5-5 months... But have to check milestones whether achieving in time or any delay,red flags... By 3-5 months babies start roll over,tries to hold neck. Give tummy time daily which helps in roll over, holding neck, crawling, abs strength...