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Growth and Maturation in the Male Genitalia From Birth to Adolescence I. Change of Testicular Volume
Author(s) -
Fujieda Kenji,
Matsuura Nobuo
Publication year - 1987
Publication title -
pediatrics international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.49
H-Index - 63
eISSN - 1442-200X
pISSN - 1328-8067
DOI - 10.1111/j.1442-200x.1987.tb00035.x
Subject(s) - medicine , testicular volume , external genitalia , volume (thermodynamics) , physiology , anatomy , endocrinology , hormone , secondary sex characteristic , physics , quantum mechanics
Testicular volumes of Japanese males from birth to adolescence were studied in cross‐sectional series. Maturational events of testicular volumes occurred in the two periods during early infancy and adolescence. The testicular volumes during the first three months of life were slightly greater than later in infancy. Thereafter there was very little increase in testicular volumes from the age 1 to 10 years. After 11 years there was a sudden increase in size. The mean volumes increased from 6.5 cm 3 at the age of 11 years to 36.7 cm 3 at 14 years. The largest increment was observed between 13 and 14 years of age and between pubic hair stages I and II. Reaching testicular volumes of 6.5 cm 3 was found to be a landmark of the earliest sign of puberty. The age at which pubertal development was initiated varied between the ninth and the fourteenth year of life.