The thermoregulating mechanisms are immature in neonates and young infants. They mature toward the end of first year of life. Also, sweat glands develop and start functioning by 6-8 months of age. The circadian rhythm is established by the 2nd birthday and tends to be more pronounced in early childhood.
Body temperature in children tends to be higher than in adults. A decrease toward adult levels begins at 1 year and slowly declines to normal body temperature through puberty and stabilizes at 13-14 in girls and 17-18 years in boys.
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