"It is important to know that all children have different development or growth.." indeed, I totally agree! So we don't have to compare them to other children. About the delayed teething, trust your pedia. I guess it has no strong link to intelligence or development. I understand your worry, as I am a mom too. When my son was small, I was always anxious about whether I was doing the right thing or not. Good that you know what to do now for your second child.

Welcome to the community and happy parenting! 💝