Аннотация:The goal of the study is to investigate secular changes in main anthropometric traits of the newborns, infants and children of early age, using a wide spectrum of the urban samples from modern Russia and the former USSR, through the period of several decades, from 1920th till now. The study summarizes the data of 338 samples of the newborns, 188 samples of 12-months old infants, 168 samples of 2-year old children, 256 samples of the 3-year old children. The secular dynamics of the body length describes the process of a significant increase of the skeletal development of children of both sexes in all growth periods. This trend is combined with the stability in body mass parameter of the newborns and infants, significant increase in body mass of 2-year-olds, and a slight increase in body dimension in 3-year-old children. The values of head circumference in newborns decrease from the 1950’s to 2000’s by 1.1-1.2 cm, which could be explained by the trend of a decrease in maternal pelvic width discussed in the literature. This trend completely stops by the end of the first year of life, and the 12-months old infants experience secular stability of this parameter. The head and chest circum- ferences of 2- and 3-year-olds keep stable through the time period under consideration.