Hello! We're from Latvia, reading your posts, we understood that medic…

Hello! We're from Latvia, reading your posts, we understood that medicine in Russia differs, or maybe I just had good luck ? How my son was born, he had his hearing checked... and since then I haven't taken him anywhere else, I mean the hospital. After the hospital for two weeks we went to a pediatrician, measured growth and weight. Nothing more. And now three months we go to the pediatrician, besides vaccinations, she says nothing about growth and weight. Do we need something extra to check? Ultrasound of the head? Lungs... anything else? How do you understand if something is wrong?