回复:If i were you
My son walked at the end of 14months. My brother walked at the end of 16months. And both are alate speakers too.
So one of two index don't mean much. Howerver, if you have several milestones delayed, which might mean delayed in general. If so, the earlier you catch the reason, the better.
Still my concern is with you because i'm a mom too. God bless.